Can I get help with uninstalling Sequoia and reinstalling Sonoma please.
I am having trouble with any of my apps working proberly, so I need to go back to the old O/S until the apps catch up.
Thank you.
[Re-Titled by Moderator]
Mac Studio, macOS 15.0
To downgrade you need to backup, download and make Sonoma USB installer and Option-boot to it, erase, install, restore.
How to download and install macOS - Apple Support
Create a bootable installer for macOS - Apple Support
Also remember that things like Photos library might have been upgraded to Sequoia and you might have to make it compatible with Sonoma (restore from a Sonoma-era backup or via iCloud while still in Sequoia).
To downgrade you need to backup, download and make Sonoma USB installer and Option-boot to it, erase, install, restore.
How to download and install macOS - Apple Support
Create a bootable installer for macOS - Apple Support
Also remember that things like Photos library might have been upgraded to Sequoia and you might have to make it compatible with Sonoma (restore from a Sonoma-era backup or via iCloud while still in Sequoia).
Follow the good advise from previous Contributor especially the part about the Photo Library
https://eclecticlight.co/2023/09/30/how-to-clean-install-modern-macos/
How can I uninstall Sequoia and reinstall Sonoma on my Mac Studio?
