Most Common macOS Sierra Problems and Solutions
see full macOS Sierra problems fixes at https://www.macxdvd.com/mac-dvd-video-converter-how-to/mac-osx-10-12-problems-solutions.htm
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1. iTunes 12.5 with macOS Sierra not responding Problem
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1. Restart your Mac.
2. Start iTunes in Safe Mode to troubleshoot this error.
3. Update iTunes to the latest version 12.5.
4. Turn off Wifi -> go to iTunes menu -> Store -> Sign Out -> turn on Wifi and open iTunes again.
5. Reinstall iTunes again.
2. Start iTunes in Safe Mode to troubleshoot this error.
3. Update iTunes to the latest version 12.5.
4. Turn off Wifi -> go to iTunes menu -> Store -> Sign Out -> turn on Wifi and open iTunes again.
5. Reinstall iTunes again.
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2. macOS Sierra issues: macOS Sierra install frozen/stuck
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1. Get rid of any antivirus software installed on your Mac.
2. Make sure you have created a Time Machine backup on hard drive.
3. Press the power button and hold down the Shift key.
4. Try updating software in Safe mode.
5. Switch from wireless connection to hardwired connection.
If you also encounter similar iOS 10 update issues, follow to solve iOS 10 problems here.
2. Make sure you have created a Time Machine backup on hard drive.
3. Press the power button and hold down the Shift key.
4. Try updating software in Safe mode.
5. Switch from wireless connection to hardwired connection.
If you also encounter similar iOS 10 update issues, follow to solve iOS 10 problems here.
3. macOS Sierra update problems: macOS Sierra won't start up after update
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1. Restart the Mac and hold down Command, Option, P and R to reset the NVRAM.
2. Reset the System Management Controller: shut down Mac > unplug all cables from Mac > wait for several minutes and plug the cables > start up the Mac
3. Try to boot Mac in Safe Mode and make sure you Mac has at least 9 GB of free space.
4. To avoid any problems updating from El Capitan to macOS Sierra, remove all third-party Kexts and extensions which are not belonged to Apple.
2. Reset the System Management Controller: shut down Mac > unplug all cables from Mac > wait for several minutes and plug the cables > start up the Mac
3. Try to boot Mac in Safe Mode and make sure you Mac has at least 9 GB of free space.
4. To avoid any problems updating from El Capitan to macOS Sierra, remove all third-party Kexts and extensions which are not belonged to Apple.
4. Problems with macOS Sierra: Mac apps can't be opened or damaged
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1. Empty caches.
2. Reset PRAM at startup.
3.Remove plugins, for example for Mail apps, remove Mail plugins installed in /Library/Mail/Bundles and ~/Library/Mail/Bundles.
4. Hold down "option + command" when you laugh the app.
5. Try the "Allow applications downloaded from: Anywhere" setting in the "Security & Privacy" System Preferences.
2. Reset PRAM at startup.
3.Remove plugins, for example for Mail apps, remove Mail plugins installed in /Library/Mail/Bundles and ~/Library/Mail/Bundles.
4. Hold down "option + command" when you laugh the app.
5. Try the "Allow applications downloaded from: Anywhere" setting in the "Security & Privacy" System Preferences.
5. macOS Sierra update problems: slow macOS Sierra performance
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1. If everything on Mac is slow, first try to restart Mac to see if it helps.
2. Reduce RAM usage or upgrade RAM to make the computer run faster.
3. Try to delete log file manually in the following folder (Command + Shift + G): ~/Library/Containers/com.apple.mail/Data/Library/Logs/Mail/.
4. Repair disk permissions with Disk Utility.
5. Run SMC and PRAM resets on Mac.
2. Reduce RAM usage or upgrade RAM to make the computer run faster.
3. Try to delete log file manually in the following folder (Command + Shift + G): ~/Library/Containers/com.apple.mail/Data/Library/Logs/Mail/.
4. Repair disk permissions with Disk Utility.
5. Run SMC and PRAM resets on Mac.
6. macOS Sierra upgrade issues: slow Wi- Fi
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1. Delete the current Wi-Fi preferences: Create a new folder > Turn off Wi-Fi > hit Command+Shift+G to get Go to Folder command, and choose the following path:
* com.apple.airport.preferences.plist
* com.apple.network.identification.plist
* com.apple.wifi.message-tracer.plist
* NetworkInterfaces.plist
* preferences.plist > Move them to the new-created folder and reboot Mac.
2. Power off/on your router and check if it needs any firmware updates.
3. Reboot your Mac in Safe mode and reboot it again.
4. Deselect Proxies: System Preference > Network > Advanced > Proxies Tab; under "Select Protocol", uncheck any box if checkmarked; click "OK" then "Apply".
5. Turn off Bluetooth.
* com.apple.airport.preferences.plist
* com.apple.network.identification.plist
* com.apple.wifi.message-tracer.plist
* NetworkInterfaces.plist
* preferences.plist > Move them to the new-created folder and reboot Mac.
2. Power off/on your router and check if it needs any firmware updates.
3. Reboot your Mac in Safe mode and reboot it again.
4. Deselect Proxies: System Preference > Network > Advanced > Proxies Tab; under "Select Protocol", uncheck any box if checkmarked; click "OK" then "Apply".
5. Turn off Bluetooth.
7. Fix to Problems with macOS Sierra Playing Certain Video Formats
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Turn to a video converter like MacX Video Converter Pro, which is so far the fastest video converter for Mac (macOS Sierra included). It solves videos not playing on macOS Sierra issues on MacBook Air/Pro, iMac etc by converting among almost all the 4K/HD/SD video formats without losing quality.
8. macOS Sierra update problems: Bluetooth Not Available
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1. Delete Bluetooth Preferences: In OS X Finder, press Command+Shift+G > find type /Library/Preferences/ > find com.apple.Bluetooth.plist > delete the file and shut down Mac.
2. Reset SMC & Power Functions.
3. Power off the system, disconnect all peripherals, and power on after 2-5 minutes.
2. Reset SMC & Power Functions.
3. Power off the system, disconnect all peripherals, and power on after 2-5 minutes.
9. macOS Sierra upgrade issues & fixes: fast battery drain
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1. Turn Off Spotlight Indexing
2. Switch browser to Safari from other third-party browsers.
3. Adjust the Energy Saver settings.
4. Check your Wi-Fi settings and disable Bluetooth.
5. Reducing screen brightness.
6. Reset the System Management Controller.
Some users also report iPhone fast battery drain, here's how to save iPhone battery.
2. Switch browser to Safari from other third-party browsers.
3. Adjust the Energy Saver settings.
4. Check your Wi-Fi settings and disable Bluetooth.
5. Reducing screen brightness.
6. Reset the System Management Controller.
Some users also report iPhone fast battery drain, here's how to save iPhone battery.
10. macOS Sierra problems and solutions: mail problem
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1. Deleting the email account in preferences, and creat a new account to see if that fixes the issue.
2. Go to Preference and select Accounts > select Account Information > find SMTP Server > select option "edit STMP server list" > reset all the settings in the list.
3. Uncheck mail extensions at Mail Menu > Preferences > select Extensions.
2. Go to Preference and select Accounts > select Account Information > find SMTP Server > select option "edit STMP server list" > reset all the settings in the list.
3. Uncheck mail extensions at Mail Menu > Preferences > select Extensions.
11. Problems with macOS Sierra upgrade: external hard drive/SD card not showing
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1. Restart Mac (remove SD card and unplug hard drive before you restart) to see if it fix this common macOS Sierra problem.
2. Try to mount the Hard Drive in OS X Finder.
3.. Try third party drovers, TEXERA NTFS and PARADON NTFS to connect the external disks to Mac system.
4. Try to reset the SMC and the PRAM on your Mac.
2. Try to mount the Hard Drive in OS X Finder.
3.. Try third party drovers, TEXERA NTFS and PARADON NTFS to connect the external disks to Mac system.
4. Try to reset the SMC and the PRAM on your Mac.
12. macOS Sierra update issues: freezing/crashing using Safari
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1. Clearing the Safari history and cache: find Library./Caches/com.apple.Safari/Caches.db and move it to the trash.
2. Temporarily switch Safari to third-party browser such as Chrome, Firefox etc.
2. Temporarily switch Safari to third-party browser such as Chrome, Firefox etc.
As a new operating system for Mac, it's a common occurrence to have some problems with macOS Sierra and Apple will strive to solve any known macOS Sierra problems with new release. And we will try to gather helpful fixes to macOS Sierra update problems before the official fix is released. This list of macOS Sierra problems and solutions will be continuously updated to cover any latest issues with macOS Sierra. We also gathere all the iOS 10 update issues tips for Apple users.
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