MacOS High Sierra continues to support full disk encryption, but Mike Bombich, who created Carbon Copy Cloner, has verified a bug in High Sierra that will cause an external drive to have its format changed from HFS+ to APFS when the drive is encrypted in High Sierra. Enabling encryption on a drive should not alter the underlying drive format. Mac mini introduced in mid 2010 or later iMac introduced in late 2009 or later Mac Pro introduced in mid 2010 or later. To find your Mac model, memory, storage space, and macOS version, choose About This Mac from the Apple menu. If your Mac isn't compatible with macOS High Sierra, the installer will let you know.
In my experience, Sierra is essentially incompatible with the current High Sierra APFS. But that is Apple's choice: it could quite easily have maintained APFS support in Sierra. And as my main working Mac is one of the many millions which Apple sold with a Fusion Drive, it can't run APFS on that even in High Sierra.
The excitement of installing a new version of macOS, especially if its a High Sierra 10.13, is only tempered by the possibility of it not working properly or not being compatible with the apps you use most.
Before you begin upgrade to macOS make a bootable backup
If you haven't started the process of upgrading yet, check if the Mac is compatible with macOS High Sierra and make a bootable backup.
Do it now, before you do anything else. If things go disastrously wrong at least you'll be able to boot from macOS' Recovery partition and migrate all your data back to your Mac. You can use any backup tool you like – Apple obviously favours Time Machine, but you don't have to use it. You can use, for example, Get Backup Pro, which comes with your Setapp subscription. Don't have a Setapp subscription? Click here to sign up.
Common macOS High Sierra problems
While most new versions of macOS are relatively problem-free, it's not unknown for users to have issues – particularly with a beta or .0 release. Thankfully most are easy to resolve. Here's how to fix the most common High Sierra issues.
High Sierra installer won't download
If you're trying to download the macOS High Sierra installer, you'll need to have signed up to App Store. If you've done that, and managed to start the downloading process only for it to fail, force quit the App Store app.
- Press Cmd-Alt-Esc or go to the Apple menu and choose Force Quit.
- Select the App Store app and confirm you want to force quit.
- Re-launch the App Store and try downloading again.
macOS High Sierra won't install
If the download completes successfully but the installation doesn't finish, force quit the installer using the same procedure as above.
- Restart your Mac
- Launch the App Store app and go to the Purchases tab.
- Find macOS High Sierra and click Install.
If that doesn't work, try deleting the downloaded installer (it's in your Applications folder) using CleanMyMac and download it again.
If you have a copy of macOS Server in your applications folder, that may be the root of the problem. Delete it and try again.
Getting the rainbow wheel every few seconds after upgrade
Check console.app and if you're getting errors from sandboxd and hidd (IOKit), your problem is a third party software. It's probably because it wasn't supported by the new APFS file system. It tries to repeatedly update causing your Mac laptop to be stuck in an endless loop. To fix this issue, just find and remove this app and everything will be fine.
What if macOS High Sierra stops responding?
If your Mac hangs and you can't do anything at all, wait up to half an hour to see if that helps. If not, force your Mac to restart by holding down the power button and waiting for it to shutdown and then start again.
Fix macOS problems
A top-notch selection of tools for fixing High Sierra issues. Try what works for you the best, free of charge.
macOS 10.13 High Sierra keeps logging out
In case you're getting tired of you new OS kicking you out of your account on random occasions, there's a chance it's pretty easy to turn it off. For instance, there is a setting in your Security & Privacy menu that is responsible for that.
- Go to Security & Privacy > Advanced and find the box saying 'Log out after… minutes of inactivity.'
- Uncheck it.
You can go even further and turn off the need to enter your password every time you open your Mac or turn it on. Mindstorms nxt 2.0 software download mac. In the same Security menu find General settings and uncheck another box, the one saying 'Require password after sleep or screen saver begins.' As you can tell, though, that it not the most secure option, especially if it's your work computer or if you can expect other people getting a hold of it.
If the problem occurs when you're using Chrome browser, disable the hardware acceleration feature: look for Advanced menu in its settings and turn off hardware acceleration.
How to fix USB devices not recognized on High Sierra
It's not a nice thing to find out after getting a brand new system, but some Macs have been struggling with USB devices after the upgrade. If your Mac is one of them and refuses to see or read USB drives, external drives, and so on, try resetting SMC.
We've explained earlier in the article how to do it, but here's brief instruction. For all laptop Macs like MacBook, MacBook Pro, and Air, simply turn it off and then on again, while holding Shift + Control + Option and the Power button for 10 seconds.
For iMac, Mac mini, Mac Pro, and Xserve, You start my turning off your Mac and then unplug the power cord. Chill for about 15 seconds. Look out of the window or something. Plug the cord back in, wait a couple of seconds and turn your Mac on.
If the problem remains, you can try to reinstall High Sierra or consult with customer support at Apple.
Security issues in High Sierra: Password Stealing
The only known and relatively famous security issue with the latest macOS is the password stealing code created by security researcher Patrick Wardle. Long story short, he showed that if he wanted to (and you allowed him by installing his malicious code on your Mac), he could extract your passwords from Keychain without having your master password for the system.
If you look into it, it all boils down to 'Don't get into white vans with strangers and don't install suspicious software from shady developers on your Mac.' Basic safety precautions. Make sure you visit the developer's website, make sure you install signed apps from trusted sources. That's about it.
Sierra
To check your safety settings, go to System Preferences > Security & Privacy > General and see if ‘App Store and Identified' developers is selected.
Meanwhile, Apple is reportedly working hard on patching up the breach.
How to fix Mac running slow on macOS High Sierra
In case you've just upgraded to the new macOS and your Mac runs slower than it used to, worry not. It's common and it's not exactly an issue. The thing is that your Mac is reindexing a bunch of files while running a new system and it slows down its productivity and performance.
For 12-24 hours your Mac could experience these trouble and they are still within the range of normal behavior. If your Mac is running slow a few days after the upgrade, try some Mac-optimizing utilities to fix it. For instance, there is an app called CleanMyMac that can remove system junk and speed up your Mac. It's a Mac cleaner with a set of handy utilities, some of which might come in handy.
For instance, one of the reasons for your Mac slowing down could be that some apps hog too much RAM. To see if this is the problem, try opening Activity Monitor and see which apps take to much processing power. If some of them seem to be exceedingly greedy and you're pretty sure that's not how it's supposed to be, you can reset them.
To fix RAM-consuming apps, use the special module in the CleanMyMac app that we mentioned earlier, Uninstaller. Simply open CleanMyMac, go to Uninstaller, find the app in question and click Reset. The app will then lose its preferences and stored info and roll back to default settings. It's basically like reinstalling it but without the hassle.
If your Mac goes all the way and becomes completely unresponsive or even needs rebooting, follow the instruction in our guide on how to speed up a slow Mac after installing macOS.
Fix problems with apps compability
With every macOS upgrade there are older versions of apps that are no longer supported by their developers. One casualty of High Sierra is Microsoft Office 2011 for Mac. Microsoft has said that it will not offer support for it running on new macOS and it's likely you'll have problems with it. The only solution is to upgrade to Office 2016.
For other apps, upgrade them and check the developer's website for details of High Sierra support. Even if an app doesn't work with the new version of the new OS, it's possible its developer is still working on support and it will work by the time macOS ships.
If you want to delete an app – perhaps because you've replaced it with a newer version – use CleanMyMac Uninstaller to make sure you delete all the files associated with the app.
Display issues on High Sierra
A few things can go wrong with your Mac's display after the upgrade, so let's see what can be done when they occur. You might experience troubles waking your Mac from sleep, when the display just never comes live or it does, but minutes after you've jammed every key on the keyboard.
Then you might also experience flickering of certain images while browsing the web. The last issue is a grey screen or a blue screen that signal something going pretty wrong with the whole Mac-to-display connection.
What you need to do to fix it is resetting your NVRAM. It's that kind of memory that unlike regular RAM is non-volitile which means it keeps info when your Mac is turned off. That's why simply turning it off and on again won't help. Anyway, it's a quick fix.
- Turn your Mac off and when you turn it back on, hold Command+Option+P+R while it's booting. You will either see your screen blink twice or hear a two chimes.
- After that you need to have your System Management Controller reset also.
- Turn your Mac off again and press and hold Shift + Control + Option and the Power button for 10-15 seconds.
That should do it.
Fix Wi-Fi problems
One of the issues that has been reported the macOS High Sierra is with wifi signals. To analyse your wifi network after installation, use WiFi Explorer or NetSpot, both available in Setapp. Both these tools map the wifi networks within range of your Mac and identify areas where signals are either strong or weak. By using one of these apps, you should be able to tell if your Mac is having wifi problems.
If you can't identify a problem and can't connect to a network, try switching wifi off in the Finder menu bar, waiting 30 seconds and switching it back on again.
Bluetooth issues on macOS 10.13
Not much has been reported about Bluetooth issues on macOS High Sierra at the moment. However, there's always one infallible piece of advice to give: re-pair your device. Find the Bluetooth icon in the upper right corner and open its preferences. If you can't see it there, go to System Preferences and find Bluetooth menu.
Hover on the device in question and click the X-mark next to it. This not just disconnects the device, but removes it entirely from the list until you pair it back. To restore the device, set it into the painting mode and when it shows up in the list below, click 'Pair.'
macOS High Sierra battery problems
Ramping up performance and adding new features while avoiding putting more strain on a battery is tough. So don't be surprised if your Mac's battery (if it's a laptop) doesn't last as long after upgrading. Use iStat Menus, available in Setapp, to monitor battery life – as well as CPU usage, fan speeds, temperatures and a host of other data. That way you'll be able to tell if your battery really is performing less well after upgrading.
If you look into it, it all boils down to 'Don't get into white vans with strangers and don't install suspicious software from shady developers on your Mac.' Basic safety precautions. Make sure you visit the developer's website, make sure you install signed apps from trusted sources. That's about it.
Sierra
To check your safety settings, go to System Preferences > Security & Privacy > General and see if ‘App Store and Identified' developers is selected.
Meanwhile, Apple is reportedly working hard on patching up the breach.
How to fix Mac running slow on macOS High Sierra
In case you've just upgraded to the new macOS and your Mac runs slower than it used to, worry not. It's common and it's not exactly an issue. The thing is that your Mac is reindexing a bunch of files while running a new system and it slows down its productivity and performance.
For 12-24 hours your Mac could experience these trouble and they are still within the range of normal behavior. If your Mac is running slow a few days after the upgrade, try some Mac-optimizing utilities to fix it. For instance, there is an app called CleanMyMac that can remove system junk and speed up your Mac. It's a Mac cleaner with a set of handy utilities, some of which might come in handy.
For instance, one of the reasons for your Mac slowing down could be that some apps hog too much RAM. To see if this is the problem, try opening Activity Monitor and see which apps take to much processing power. If some of them seem to be exceedingly greedy and you're pretty sure that's not how it's supposed to be, you can reset them.
To fix RAM-consuming apps, use the special module in the CleanMyMac app that we mentioned earlier, Uninstaller. Simply open CleanMyMac, go to Uninstaller, find the app in question and click Reset. The app will then lose its preferences and stored info and roll back to default settings. It's basically like reinstalling it but without the hassle.
If your Mac goes all the way and becomes completely unresponsive or even needs rebooting, follow the instruction in our guide on how to speed up a slow Mac after installing macOS.
Fix problems with apps compability
With every macOS upgrade there are older versions of apps that are no longer supported by their developers. One casualty of High Sierra is Microsoft Office 2011 for Mac. Microsoft has said that it will not offer support for it running on new macOS and it's likely you'll have problems with it. The only solution is to upgrade to Office 2016.
For other apps, upgrade them and check the developer's website for details of High Sierra support. Even if an app doesn't work with the new version of the new OS, it's possible its developer is still working on support and it will work by the time macOS ships.
If you want to delete an app – perhaps because you've replaced it with a newer version – use CleanMyMac Uninstaller to make sure you delete all the files associated with the app.
Display issues on High Sierra
A few things can go wrong with your Mac's display after the upgrade, so let's see what can be done when they occur. You might experience troubles waking your Mac from sleep, when the display just never comes live or it does, but minutes after you've jammed every key on the keyboard.
Then you might also experience flickering of certain images while browsing the web. The last issue is a grey screen or a blue screen that signal something going pretty wrong with the whole Mac-to-display connection.
What you need to do to fix it is resetting your NVRAM. It's that kind of memory that unlike regular RAM is non-volitile which means it keeps info when your Mac is turned off. That's why simply turning it off and on again won't help. Anyway, it's a quick fix.
- Turn your Mac off and when you turn it back on, hold Command+Option+P+R while it's booting. You will either see your screen blink twice or hear a two chimes.
- After that you need to have your System Management Controller reset also.
- Turn your Mac off again and press and hold Shift + Control + Option and the Power button for 10-15 seconds.
That should do it.
Fix Wi-Fi problems
One of the issues that has been reported the macOS High Sierra is with wifi signals. To analyse your wifi network after installation, use WiFi Explorer or NetSpot, both available in Setapp. Both these tools map the wifi networks within range of your Mac and identify areas where signals are either strong or weak. By using one of these apps, you should be able to tell if your Mac is having wifi problems.
If you can't identify a problem and can't connect to a network, try switching wifi off in the Finder menu bar, waiting 30 seconds and switching it back on again.
Bluetooth issues on macOS 10.13
Not much has been reported about Bluetooth issues on macOS High Sierra at the moment. However, there's always one infallible piece of advice to give: re-pair your device. Find the Bluetooth icon in the upper right corner and open its preferences. If you can't see it there, go to System Preferences and find Bluetooth menu.
Hover on the device in question and click the X-mark next to it. This not just disconnects the device, but removes it entirely from the list until you pair it back. To restore the device, set it into the painting mode and when it shows up in the list below, click 'Pair.'
macOS High Sierra battery problems
Ramping up performance and adding new features while avoiding putting more strain on a battery is tough. So don't be surprised if your Mac's battery (if it's a laptop) doesn't last as long after upgrading. Use iStat Menus, available in Setapp, to monitor battery life – as well as CPU usage, fan speeds, temperatures and a host of other data. That way you'll be able to tell if your battery really is performing less well after upgrading.
Your Mac use more power when it's processor is under stress – partly because it generates heat which needs fans to cool it. So quit any apps that are hogging processor cycles if you're not using them. You should also update apps to their most recent versions, and could turn down your screen's brightness and move somewhere cooler if you're sitting somewhere that's particularly hot.
If your Mac's battery hasn't been its best self since the upgrade, try checking where the problem is. Open Activity Monitor > Energy and see which apps take up the most. Browsers and rendering software is expected to be energy-heavy, so that's normal.
Why Won T Sierra Download On My Mac Catalina
But if you're seeing some minor applications you rarely use taking up a chunk, consider uninstalling them. You can use the specially-made CleanMyMac's Uninstaller for the job, because just dragging an app to the trash doesn't uninstall it fully.
No Mail notifications in macOS High Sierra
In case you either see mail notification for less then a second or don't see it at all, there might be a problem with settings. Try checking if you have the notifications turned on in System Preferences > Notifications. Does you alert style say 'Banner'? If it does but the problem remains, change the alert style from 'Banner' to 'Alert' or 'None'. After that you can switch it to 'Banner' again and from now on it should work fine.
APFS compatibility issue with games and Unity engine
This part is for gamers only. If any of these names ring a bell for you, don't rush to upgrade: 'Cities: Skylines', 'Civilization V', 'Team Fortress 2,' 'Half-Life 2,' and 'Counter-Strike: Global Offensive.'
Developers of these games and of the Unity engine, joined by threads on Reddit and Steam, have all voiced concerns about the APFS system and its compatibility with the main game engine and graphic controls. So, before you upgrade, hit Reddit or Google and find out if these troubles have been resolved.
If all else fails
If a force restart doesn't work and you can't get your Mac to run the new OS at all, the next step is to try repairing the disk on which it's installed.
- Restart your Mac while holding downs cmd+R to boot in recovery mode.
- When it's booted, choose Disk Utilities from the macOS Utilities menu.
- Click Repair Disk to to fix any problems on the disk.
- When it's done, restart your Mac normally.
If that doesn't work, you'll need to reinstall macOS.
- Plug in the hard drive on which you made the bootable backup and select it as your Mac's Startup Disk in System Preferences.
- Re-boot while holding down cmd+R.
- When the macOS Utilities menu appears, choose Disk Utilities and use it to erase you Mac's main drive.
When it's done, choose Reinstall macOS and select your Mac's main drive as the destination. Wait for High Sierra to install and restart. When you see the Setup Assistant, choose the option to migrate data from another disk and choose the external disk as the source.
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Meantime, prepare for all the awesome things you can do with Setapp.
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macOS High Sierra has recently gone public. It's natural for it to have unforeseen bugs and rough edges. And right now you yourself are helping Apple to solve them by seeking fixes to common macOS High Sierra issues. We've pieced together the most reported ones so far (as of December 2017), from macOS High Sierra not downloading to Wi-Fi issues and a few others.
macOS High Sierra issues: what can go wrong?
- macOS High Sierra download has failed
- macOS High Sierra installation is frozen
- Not enough disk space to install macOS High Sierra
- Time Machine is stuck on 'Preparing the Backup'
- macOS High Sierra is slow or freezes at random
- Mac won't start after macOS High Sierra installation
- Wi-Fi is slow on macOS High Sierra
- App crashes or doesn't open on macOS High Sierra
- Battery life reduced on macOS High Sierra
- Password issues on macOS High Sierra
- Mail problems on macOS High Sierra
1. 'macOS High Sierra download has failed.'
As soon as you started downloading macOS 10.13 the download would end abruptly and you will get messages like the one above. You may be shown a 'Installation of macOS could not continue' message on your screen.
Aside from poor internet connection, it's possible that too many users are downloading the macOS at the same time. Try rebooting the Mac App Store or repeat the download in a few minutes.
1. Go to Apple menu (upper left corner)
2. Choose Force Quit
3. Find the App Store app in the list and quit it
Can you improve your internet connection? Hop on a better Wi-Fi network or connect via cable. Before you resume the installation, remove all partially downloaded files (that are named macOS 10.13 High Sierra) from your Mac. Try again.
2. macOS High Sierra installation is frozen
You downloaded macOS High Sierra and clicked the installation file, but for some reason, nothing happens. You clicked Continue, but the now button appears to be greyed out. Control + click the installation icon —> Choose Quit. Go to Applications to find the macOS High Sierra Installation file. Repeat the installation. Be patient, it does take some to begin.
You downloaded macOS High Sierra and clicked the installation file, but for some reason, nothing happens. You clicked Continue, but now the button appears to be grayed out.
1. Control + click the installation icon in the Dock
2. Choose Quit
3. Go to Applications to find macOS High Sierra Installation file
4. Repeat the installation
3. Not enough disk space to install macOS High Sierra
macOS High Sierra takes about 8 GB on a drive. Though it doesn't seem terribly much, it is still recommended to have at least 15-20 GB of storage for macOS High Sierra to run smoothly. But first of all, figure out what's taking up your valuable space.
Go to Apple menu —> About this Mac
Click on the Storage tab
To get some storage space back, my favorite is CleanMyMac app. It has a feature that specifically searches for large and unused files on your drive. Deleting system junk alone would save you around 2 GB. You can always prefer to do the job manually, but it could be too much of a hassle.
Anyway, it's a safe practice to install the new macOS on a clean Mac. So download CleanMyMac for free and clean up your drive. By then your Mac should be ready to install and download macOS High Sierra.
4. Time Machine is stuck on Backup
This issue has been reported since El Capitan and unfortunately is still the case in macOS High Sierra. The Time Machine hangs while showing 'Preparing backup message' and may stay unresponsive for hours.
1. Stop the current backup procedure
Go to the Time Machine settings menu and click the red [X] to end the backup process.
2. Delete the temporary .inProgress backup file
1. Go to Time Machine drive (in the Finder)
2. Open 'Backups.backupd' folder
3. While inside, locate the folder that has the name of your Mac on it
4. Type .inProgress in the search bar above
5. Locate the file with .inProgress file extension and delete it
Well done. Now you have removed the unsuccessful backup file.
3. Restart your Mac and repeat the backup using Time Machine.
5. macOS High Sierra is slow or freezes at random
Try giving the system some time to configure itself. If it doesn't help, reboot your Mac. Some users reported their Mac was running slower after the macOS High Sierra update. Check out this guide on how to speed up your Mac and try these tips on your machine. First, figure out what's causing the slowdown. Go to Applications —> Activity Monitor and see what apps are weighing on your Mac's memory. Force quit the apps that are excessively eating up CPU resources.
Another effective method is to delete your system caches. These temporary files pile up in system libraries and are known to cause various software conflicts. To clear your user cache manually, follow these steps:
- Open Finder and click 'Go to Folder' in the Go menu
- Type in ~/Library/Caches and hit enter
- Go into each of the folders and clean out the files inside.
Note: Do not delete the files themselves, just their insides.
Now, repeat the same steps from above, but replace..
~/Library/Caches with… /Library/Caches
Please note that this method isn't safe as you may accidentally delete the wrong folder.
To safely clean out your system caches, there is an easy workaround. It is secure and takes no more than a minute. Download CleanMyMac X (it's free to download) and click System Junk. This way you'll remove all system junk without risk to your Mac.
6. Mac won't start after upgrading to macOS High Sierra
Reset NVRAM
So you have successfully installed macOS High Sierra, but for some reason, your Mac won't boot up. You may try to reset NVRAM in this case. NVRAM stands for non-volatile RAM and stores various system settings like time-zone, startup disk selection, kernel panic preferences, or display resolution. Resetting NVRAM helps to perform a fresh boot from scratch.
1. Turn on your Mac holding Option, Command, P, and R keys
2. Keep the keys pressed for about 20 seconds
3. Let off the keys when you hear a second startup sound
Now your NVRAM has been reset. Additionally, you can launch Disk Utility to fix boot up problems with macOS High Sierra.
Enter Internet Recovery mode
Internet Recovery starts your Mac from Apple's external servers. This is a helpful utility to use in case your boot sector is damaged or there are some hardware issues with macOS High Sierra. The utility will perform memory tests and configure your Mac for successful bootup.
To start Internet Recovery:
1. Restart your Mac
2. Wait for startup chime and hold Command + Option + R
3. Release the keys after the animated globe pops up
Then your system will download a recovery image from the Internet. To proceed from then, just follow the prompts on the screen.
7. Wi-Fi is slow on macOS High Sierra
Some people reported their Wi-Fi dropping off after installation of macOS High Sierra. You may also notice your connection got slower. To tackle this, update your Wi-Fi preferences. First, you will need to remove the current settings which is quite easy to do.
1. Click on the Finder
2. Press Command + Shift + G
3. Type in the following line:
/Library/Preferences/SystemConfiguration/
4. Within that directory, you need to select the files with .plist file extension. These are your current preferences (probably bugged or corrupted).
Why Won't Sierra Download On My Mac
com.apple.airport.preferences.plist
com.apple.network.identification.plist
com.apple.wifi.message-tracer.plist
NetworkInterfaces.plist
preferences.plist
5. Move the selected files to the Trash.
6. Restart your Mac and router for changes to take place. Don't worry, the new preferences will be created automatically to replace the old ones.
8. Your apps crash on macOS High Sierra
This is a common issue as Apple has moved to the 64-bit architecture with the release of macOS High Sierra. The implication is that the whole scope of 32-bit applications will not be supported on the new macOS update. Not all developers have yet converted their apps to 64-bit, but it's a question of time, really.
If the app repeatedly crashes on macOS High Sierra, update it to the latest version. You may visit the developer's website and read about High Sierra compatibility.
Another option is to reset the app. In 90% of cases, this method will prevent an app from crashing again.
From my experience, I found that an automatic solution works better. I personally use CleanMyMac to uninstall and reset the problematic apps and it works magic.
- Download CleanMyMac X (free download).
- Go to the Uninstaller tab.
- Choose an application from the list.
- Click a small arrow next to the application logo
- Click Application reset.
Launch the app and see if it helped.
9. Battery drains too fast on macOS High Sierra
Has your battery life reduced after upgrade to macOS High Sierra? This issue has also been reported since June 2017 High Sierra Beta release.
To look deeper into the issue, go to Activity Monitor to check what processes are most energy-demanding. Just go to Applications -> Utilities -> Activity Monitor. Click the Energy tab for details. If a particular app is a burden on your battery, reinstall or reset it (as described in the chapter above). Additionally, consider replacing the app with a lighter alternative.
Why Won T Sierra Download On My Mac Os
What else to do to save battery life:
- Turn off location services
- Disable animations & graphical effects
- Dim your screen
- Also, check this guide to prolong Mac battery life
10. Password problems on macOS High Sierra
Advertised as the 'most secure Apple's macOS', High Sierra looks a total opposite, just months after its release. Three 3 major password scandals have already broken out and how many bugs are there to come? In September 2017 a technology expert, Patrick Wardle has proved that it is possible to retrieve the Keychain's passwords without first providing your master password. This vulnerability can be accessed by an unsigned app and concerns not only High Sierra but previous macOS releases as well.
Then, a major root password bug, allowing full access to your Mac without any password at all. If you haven't set your root password (it's like a ground-level admin password), it's time to do it now. The quickest is to do it via Terminal.
Why Won T Sierra Download On My Mac Os
Apparently, this is not the only password issue with High Sierra. There has been detected a problem where macOS High Sierra would show you your original password instead of a password hint. To solve it, Apple recommends installing a Supplemental Update to macOS High Sierra. Meanwhile, you can protect your important data with a trusted encryption solution. Hider 2 app is a nice one and is quite flexible for most users' needs.
11. Mail problems in macOS High Sierra
The Mail app in macOS High Sierra has proved vulnerable to errors as well. A few folks have reported that email notification stopped working right after the update. In other words, email banners were missing. Good news, it can be quickly fixed via System Preferences.
1. Go to System Preferences -> Notifications
2. Choose Mail
3. Reset the alert style from 'Banner' to 'None'
4. Then switch it back to 'Banner'
This should reactivate the Mail notification service.
What else may go wrong? You may notice your Mail app now works slower after you've upgraded to macOS High Sierra. The explanation is that it's probably overloaded with messages and still carries the leftovers from the previous macOS. As a result, it takes forever to search for the things you need. Some apps offer an easy fix for this and will reindex (or reorganize) the Mail database on the new macOS for you.
For instance, the latest version of the CleanMyMac app has a special tool that speeds up your Mail. You can download the app (it's free to download) and open the Maintenance module.
Sierra Download Without App Store
When within the Maintenance module, launch the Mail Speed up tool. That's it, your Mail should now get speedier. See the screenshot above.
High Sierra Download
Despite the aforementioned problems macOS High Sierra still packs an impressive punch of simplicity and power. Get to know it more, explore the newly added features as each one has a tremendous amount of clever engineering behind it. Meanwhile, thanks for reading this article. Stay tuned for more.
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