Warning : Files you created after the upgrade point will not be restored. What you should end up with is a Mac that’s in the exact state it was in before the upgrade.
To use this method, you’ll need to restart your Mac from the Recovery HD and restore your Mac from a selected Time Machine backup. (Booting to the Recovery HD allows you to restore your Mac to a previous state using Time Machine.) In this example, macOS High Sierra was installed on a hard drive that was not converted to APFS, allowing you to use this simple method to downgrade. In this example, you’re going to make use of your Time Machine backup to downgrade from macOS High Sierra to macOS Sierra. If you’re downgrading and both the currently installed OS and the one you’re moving back to both use the same file system, then you may only need to make use of your backup files. An example would be downgrading from macOS High Sierra that was installed on an APFS formatted drive to a version of the OS that doesn’t support APFS. You’ll need the bootable OS installer if you’re downgrading from a macOS version that has an incompatible file system installed. In general, you need to have a backup of your Mac as it existed before you started the upgrade process you may also need to have a bootable copy of the version of the macOS installer you wish to downgrade to. Preparing properly is a two-step process. Without the proper preparations, downgrading can be difficult, to say the least.īefore you attempt any downgrade, you should ensure you have a backup of your Mac as it currently exists, so you can return to the current state should anything cause the downgrade to fail, or needed files not to work with the older version of the OS.ĭowngrade to a Previous Version of macOS When You Prepared Properly With the right preliminary preparations in place before you perform an upgrade, downgrading can be fairly easy, though a bit time consuming.
Downgrade os mac sierra from high how to#
( Related: How to Disable Downloading of macOS High Sierra) And when those consequences are severe enough, you may decide to try to downgrade from High Sierra or the forthcoming macOS Mojave to one of the earlier versions of macOS. You get the idea upgrading to a new OS can have unexpected consequences that may end up with you wishing you never updated to begin with.
Downgrade os mac sierra from high driver#
Will all my older apps work? Are there any serious bugs in the new OS? Will my peripherals continue to work, including that wide-format LaserJet from the 90s that hasn’t had any driver updates since the millennium, but continues to be my go-to workhorse for tabloid printing? Installing a new version of the macOS can cause a bit of trepidation.
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