What is the Best Way to Downgrade From Sequoia 15.1 back to Ventura w/ Time Machine Backup?

From Barney-15E

I think there is only one way to revert, but there are options as to how you accomplish the reinstall.

The one way to revert is to Erase the drive completely, reinstall the old macOS, and Migrate your user account from Time Machine.

The reinstall part is where you would find differences. In my opinion, a Bootable USB Installer is the only sane option. By using that you have a known bootable device with the macOS version of choice prior to erasing.

Maybe this is another way (probably much safer), if you have enough space on the Startup drive. Add an APFS volume to your startup drive and install Ventura on that. You may still need the bootable USB Installer. Migrate the user account from Time Machine. when everything works as desired, you can remove the Sequoia volumes.

Thank You for the help. I did create a two MacOS's, Ventura & Sequoia on two seperate bootable USB drives from the beginning. I wanted a good clean install so I wouldn't have any hiccup's.

I followed the YT videos below which worked out great.

I followed the first way out of the four;

How to Download macOS Sequoia FULL INSTALLER 4 DIFFERENT WAYS

How to Create a macOS Sequoia USB Installer Boot Disk [IN 5 MINUTES]

Thanks again, appreciate the help. Ray

I have done that in which they gave me their link to the latest driver. I confirmed the installation and the problem still remains. I also performed the Mac First Aid that didn't show any issues on the MacBooks HD. I would not perform a check on the Pegasus. Thanks.

I did that in which they gave me the latest driver update. I confirmed the update but, the problem remained. I also performed Macs First Aid. No problems with the MacBook pros HD. Tried the Pegasus but, it rejected it. Thanks

Thank you for the help.... I did contact Promise support and updated the the Driver and changed Full Security to Reduced Security under Hardware > Controller > Boot Policy as Promise support suggested.

I also tried to prevent Spotlight from searching the Pegasus but, I received a pop-up (below) stating Search Privacy > add (+) to prevent Spotlight from searching these locations. My Pegasus was not in the list. I also changed Full Security to Reduced Security under Hardware > Controller > Boot Policy as Promise support suggested. Also, I have a 2TB Seagate external HD that won't eject as well. Thanks again, I sincerely appreciate your help in trying to get this resolved. Ray

From dialabrain;

It's not easy. First you have to create a bootable installer, then erase the drive, then restore your data using the Time Machine backup. As far as ejecting the Pegasus drive, you can always shutdown your Mac, then unplug the drive.

Thanks..... Exactly what I did. Actually is was quite easy following these two YT video's;

I followed the first way out of the four;

How to Download macOS Sequoia FULL INSTALLER 4 DIFFERENT WAYS

How to Create a macOS Sequoia USB Installer Boot Disk [IN 5 MINUTES]

Thanks again, appreciate the help. Ray

I also went into Spotlight settings to turn off indexing on my Pegasus but, I received the following pop-up when I chose it in the Choose window;

I also tried a different EHD in which I was able to choose it. After doing so, I backed out of System Settings and tried to eject the drive..... No luck. I proceeded in logging off / on.... No luck. Problem remains.

System Settings > Spotlight > Search Privacy > Privacy +/- window > + > (Chose the EHD) in the Choose window > (Confirmed) Privacy window

Thanks for the help. My TM is on a dedicated external HD. Thanks

It's setup only for my Mac drive.