If you don't do this, you'll lose all your data. This is an extreme step, so we only suggest it when you've already tried all the other fixes and Preview still fails to open or work properly.īefore you reinstall macOS, don't forget to back up your Mac with Time Machine or any other backup tool, like iBoysoft DiskGeeker. Unsurprisingly, the last troubleshooting option you can take to fix Preview not working on MacBook is to erase your Mac and reinstall macOS. You can transfer all your data to the new account and start using the new one. If Preview works in a different user account, it means your original user account has a problem. After finishing testing, you can delete the user on Mac. If you don't have any other user accounts on your Mac, add a new macOS user account first. Try logging into a different user account and testing Preview in that account instead. If Preview still fails to open, there might be a problem with your macOS user account. Restart your Mac and the Preview should be working now.Select each item on the list and click the minus icon (-).Click the lock icon and input your admin password to be authorized to make changes.Click on your username and select the Login Items tab.Click on the Apple logo and choose System Preferences.With the help of Finder, you can easily find and delete it. PLIST file contains all the data about your preferences and settings for the Preview app. To reset Preview, you'll need to delete its PLIST file. If macOS is up to date, maybe it's time to reset Preview so that it can revert to the original state. If there is an update available, click Upgrade now. Choose System Preference and click on Software Update. To do so, click on the Apple menu and choose About this Mac. This is because Apple frequently patches its updates to fix software bugs. What you can do to fix macOS bugs is to update your Mac to the latest available software. If the version of macOS running on your Mac has a bug, the Preview app may not work normally. If restarting is unresponding, force shut down your Mac and reboot your Mac computer manually. To restart your MacBook, simply click the Apple menu and select Restart. A quick macOS restart should fix this problem and meanwhile clear out RAM or temporary files to boost your Mac performance. Sometimes, the macOS misbehaving may cause Preview not to work on your MacBook Air or MacBook Pro. If closing Preview and reopening it didn't work, try to restart your Mac instead.
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