You can make a difference in the Apple Support Community!

When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

What is the correct procedure for reverting to an older MacOS version?

I am trying to revert from MacOS Monterey to Big Sur. If I understand correctly, would I:


1) Backup my computer in Monterey via time machine.

2) Erase the hard drive and use Mac Recovery at startup to restore the older Big Sur version I wish to use.

3) Tell my computer to restore from my time machine.


If I do this, will I be able to do Step 3? That is, if the restore was done in Monterey, will it still restore my files and everything else? I understand that certain Monterey specific files may not transfer over, but will the rest transfer over correctly? Thanks.

MacBook Pro 13″, macOS 12.5

Posted on Aug 9, 2022 8:12 PM

Reply
Question marked as Top-ranking reply

Posted on Aug 10, 2022 4:42 AM

Scorched Earth Method 


This method will WIPE ALL Data and there is No Recovery - Period.


>>>> Only works on Intel Based Apple Computer <<<<


To perform this action will require booting from a Bootable Installer


The Bootable Installer can Only be performed on an Apple Computer 


This will have to be performed from a Qualifying Computer to run the version of macOS to be made on the Bootable Installer. Example : Bootable Installer of Big Sur would have to be done on a computer that Qualifies to run Big Sur.


Notation: If the computer being used to perform this action is Too New or Too Old to qualify to run the version of macOS - this computer can not be used.


Alternative is, to gain access to a Qualifying Apple Computer from a family member, friend or associate.


Extra Special Notation regarding the Touch ID equipped Apple Computer.


About Startup Security Utility and Must Enable from Recovery Mode the ability to boot from External Drive Before Attempting 


1 - Shutdown computer and disconnect all external drive Except the newly created Bootable Installer.


2- Restart and immediately hold the OPTION key until the Startup Manager appears and choose the USB Drive. 


3 - It will present options >> Disk Utilities >> View >> View ALL attached Drives. 


4 - Choose the Upper Most Drive ( not the volumes indented and list below ).


5 - The drive normally is called Apple Media or Apple SSD - that is the drive to Erase and format as APFS with the GUID Partition Map. This applies to macOS 10.14 Mojave and above. 


6 - Once that is done >> backup out of Disk Utilities and choose install macOS. 


7 - Follow the prompts and it may automatically reboot several time. 


8 - Upon a final reboot - Setup Assist will present with the newer version of macOS.

Similar questions

2 replies
Question marked as Top-ranking reply

Aug 10, 2022 4:42 AM in response to appluser1333

Scorched Earth Method 


This method will WIPE ALL Data and there is No Recovery - Period.


>>>> Only works on Intel Based Apple Computer <<<<


To perform this action will require booting from a Bootable Installer


The Bootable Installer can Only be performed on an Apple Computer 


This will have to be performed from a Qualifying Computer to run the version of macOS to be made on the Bootable Installer. Example : Bootable Installer of Big Sur would have to be done on a computer that Qualifies to run Big Sur.


Notation: If the computer being used to perform this action is Too New or Too Old to qualify to run the version of macOS - this computer can not be used.


Alternative is, to gain access to a Qualifying Apple Computer from a family member, friend or associate.


Extra Special Notation regarding the Touch ID equipped Apple Computer.


About Startup Security Utility and Must Enable from Recovery Mode the ability to boot from External Drive Before Attempting 


1 - Shutdown computer and disconnect all external drive Except the newly created Bootable Installer.


2- Restart and immediately hold the OPTION key until the Startup Manager appears and choose the USB Drive. 


3 - It will present options >> Disk Utilities >> View >> View ALL attached Drives. 


4 - Choose the Upper Most Drive ( not the volumes indented and list below ).


5 - The drive normally is called Apple Media or Apple SSD - that is the drive to Erase and format as APFS with the GUID Partition Map. This applies to macOS 10.14 Mojave and above. 


6 - Once that is done >> backup out of Disk Utilities and choose install macOS. 


7 - Follow the prompts and it may automatically reboot several time. 


8 - Upon a final reboot - Setup Assist will present with the newer version of macOS.

What is the correct procedure for reverting to an older MacOS version?

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.