Downgrade Using an Older macOS Installerīefore the release of macOS Mojave, it was possible to download older versions of macOS directly through the App Store.
On the next screen, click Continue again.When the macOS Utilities screen appears, select Restore From Time Machine Backup and click Continue.On the next screen, select Options to launch Recovery mode. On Apple silicon Macs (M1 and M2 models), keep holding the Power button on startup until you see the Loading Startup Options message. Hold Cmd + R to enter macOS Recovery on an Intel Mac. Plug your Time Machine disk into your Mac and power it down or restart it.To downgrade using a prior Time Machine backup, follow these simple instructions: This, of course, assumes that you created the backup on an older version of macOS.
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Using a Time Machine backup is another simple way to install an older version of macOS. Once the installation is complete, restore your files from the backup you created.Walk through the onscreen instructions to complete the rest of the installation process.Follow the prompts and choose your startup disk.Once the macOS Utilities screen loads, choose Reinstall macOS (or Reinstall OS X) and click Continue.You’ll notice startup takes longer than normal as macOS Recovery loads. Power on your computer and immediately hold Shift + Option + Cmd + R.Make sure you’ve fully backed up your Mac first because the following procedure will erase your startup disk: If your computer is quite old, this will instead download the oldest version that’s still available. The process is similar to reinstalling macOS but will instead download the version of macOS that your computer originally shipped with. You’ll need to use the Time Machine or bootable disk method for those Macs. This method only works on Intel-based Macs and can’t be used on Apple silicon Macs like the M2 MacBook Air.
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