MacOS Sierra: Revert to a previous macOS version To restore your computer to the state it was in before you installed the new version of macOS, choose the most recent backup that occurred before you installed the new version. Select the Time Machine backup you want to restore. Select “Restore from a Time Machine Backup,” then click Continue. After your Mac restarts (some Mac computers play a startup sound), press and hold the Command and R keys until the Apple logo appears, then release the keys. To save new or revised files, copy them onto a different disk or back them up before you follow these instructions.Ĭlick the Share button in the Help window, then choose Print.Ĭhoose Apple menu > Restart. Important: Reverting erases any changes you made to the files on your Mac since you installed the new version of macOS. If you have an older backup available from the previous macOS version, you can restore using that older backup. ![]() Based on what you stated, it seems like you want to revert to a previous macOS version but you made a backup after you upgraded. Thank you for contacting Apple Support Communities.
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