Finally, restore the backed-up data from the Time Machine backup drive to the encrypted drive. Step 3) Reinstall macOS from the macOS Utilities window. Once complete, your Mac will be returned.
#How to clear time machine on mac password#
Enter your password to sign out of your Apple ID, then let the erase process finish. The solution to that is of course to plug in the missing backup and let it run, but what if you no longer own the drive in question? Or if it failed or got run over by a giant chicken or something? Well, to stop Time Machine from warning you about the lost backup drive, you’ll need to remove it from the preferences on your Mac, which is luckily darned easy. Erase the startup disk in an encryption format after backing it up by using Time Machine. Click Open Time Machine to create it, if you haven't already done so. You see, if you’ve configured more than one Time Machine disk, your Mac will take turns backing up to each of them when they’re plugged in or connected over your network you’ll get the warning I mentioned when one of your disks hasn’t been used for a while, even if the other backups are working fine. If you back your computer up to multiple drives using Time Machine, you may be familiar with the notification that tells you that you haven’t been backed up in.