Though Apple has made a precaution that important files may get lost if the macOS software update is interrupted, many of you still forgot to back up your MacBook Air/MacBook Pro/iMac/Mac mini. How to restore or recover lost files after macOS Big Sur update? If you are using third-party software to back up your Mac, check if it's ready for macOS 11. Note that these backups and new backups created after are only compatible with Mac computers running Big Sur and later. In that case, your existing backups are also upgraded to be used on macOS Big Sur. Suppose you upgraded to macOS Big Sur on a Mac that uses a Time Capsule or other network storage device as the backup destination. Therefore, it's always recommended to back up Mac files before every major macOS software update using the built-in Time Machine. It makes data backup with third-party apps difficult, especially those that offer bootable backups. Since macOS 10.15 Catalina, Apple split the startup disk into two separate volumes, Macintosh HD and Macintosh HD - Data.

Built-in or Third-party Apps Issues in macOS Big Sur Poor Performance When Using macOS Big Sur Startup issues after installing macOS Big Sur Fail to download and install macOS Big Sur Remember, you'll need to pay $100 (about £69, AU$140) to enroll.In the following sections, we will talk about practical solutions to fix macOS Big Sur problems.

Click the 'Start Your Enrollment' to begin and then follow the instructions. You'll need an Apple ID, and provide your basic personal information. If you’re not currently enrolled, then go to the Apple Developer Program enrollment webpage (opens in new tab), which will show you everything you need to sign up. To do that, you need to be enrolled in the Apple Developer Program. Once you've downloaded macOS 11 Big Sur, you might want to play with the more cutting edge developments in the OS that aren't available to the public yet. How to enroll in the Apple Developer Program For information on how to do this, head over to our ultimate guide to backing up your Mac. Whenever you upgrade your operating system we highly recommend backing up the files on your Mac, so if anything goes wrong you can quickly restore your machine to its previous working order.īefore you download and install macOS 11 Big Sur, make sure your Mac is backed up. (Image credit: Apple) Back up your Mac before upgrading to macOS 11 Big Sur

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