#Downgrade mac os x how to
#Downgrade mac os x install
#Downgrade mac os x update

The next screen will display all of your backups.

On the ‘Restore from Time Machine’ screen, click ‘Continue.’.

In macOS Utilities, select ‘Restore from Time Machine Backup.’.

Release these keys as soon as you see the Apple logo.

Restart your Mac while holding down the ‘Command+R’ keys.

If the backup is stored on an external or network drive, then make sure this drive is available to your Mac.

Reinstalling an earlier backup will undo all the changes you made since creating this backup, so make sure all of your documents and data are stored somewhere safe before proceeding.

#Downgrade mac os x update

If you create regular Time Machine backups (and you should!) then you may be able to reverse a macOS update by restoring a Time Machine backup that you created before installing that update.

Choose your startup disk, and then select ‘Install.’ Using a Time Machine backup.

Once you see the macOS Utilities screen, select ‘Reinstall macOS’ and then click ‘Continue.’.

Restart your Mac, while holding down the ‘Shift+Option+Command+R’ keys.

If you want to have both systems, because of your legacy software, then that will be something that you will have to deal with.If you’re on High Sierra 10.12.4 or later, and you want to revert to the version of macOS that shipped with your Mac, then you’re in luck! This is one of the easiest ways to downgrade your Mac: There would be workarounds to get that to work, too. I think you will also realize that you will perhaps struggle when choosing to boot from one system, then the other on the same drive. You will want to decide how much drive space you want for each system.

#Downgrade mac os x install

Once the drive is erased (and you have reverted back to a Mac OS Extended format), then you will be able to install Sierra - followed up with reinstalling Monterey. If you still need to erase the internal drive (and you do need to erase that drive to do what you want with a Sierra system!), then you have to erase the drive with a system newer than Sierra. Someone found the solution to my problem, so I'm posting here in case it might help someone:īoot to a High Sierra installer, and the internal drive will be now visible, and you can erase, or do anything else that you need to do with the internal drive. I just want to get rid of Monterey and get my old Sierra back. I posted to and received only copy-pasted suggestions that I've already tried.)Ĭlearly there is something fundamentally incompatible between the APFS file system and HFS that's preventing cross-pollination. (I've been using Macs since 1986 and am very comfortable trouble-shooting.

I have read a dozen articles that seem somewhat related, but haven't found one that directly addresses my issue including and and Īnd only turned to this forum in desperation.I wanted to do this but when I go to Disk Utility on the old laptop and choose 'New Image' - the 'Macintosh HD' option is grayed-out. The one thing I can think of that I have NOT yet tried is to create a new recovery flash drive apart from the Time Machine backup/boot and the dedicated boot drives that I have. Or when I choose 'Restore' to the new partition, I get the error, 'Source volume format on device is not valid for restoring' EG, 'Error 13' which appears to be some kind of Unix code. This generates error messages that appear to be some kind of incompatibility between Sierra and Monterey. I have tried within Monterey, partitioning the new SSD, creating a HFS partition in order to install Sierra on that. In all of the above, have tried 'Restore', 'Install New OS', and 'Disk Utility' in these attempts, the SSD drive doesn't appear as an option.

I've tried everything, including creating a HFS partition on the SSD, but when I try to run disk utility from the external drive, it doesn't even see the SSD.īooted from Sierra Time Machine backup external drive.īooted from a dedicated external Sierra boot drive.

#Downgrade mac os x how to

I have a Time Machine / bootable external HD but can't work out how to erase the new SSD and put Sierra on it. I bought a refurbished 2015 MacBook so that I could continue using my legacy software, but its SSD came preinstalled with OS 10.14 Monterey.