How to downgrade my Mac OS to version 13.9.9
I need to downgrade my operating system to be compliant with my organization?
MacBook Pro 16″, macOS 14.0
Question marked as
There are no macOS downgrades, and never have been. Upgrades are one-way.
To start over again…
If your Mac originally arrived with macOS 14 Sonoma, that may well be the minimum version supported for that Mac. (I don’t think here are any Sonoma-only Macs yet.)
If the Mac was supported by an older macOS version, wipe it, and re-install an older version of macOS from Recovery, or download an older macOS version while running macOS 14 and use that to build a bootable installer and then boot that installer and use that to wipe and re-install macOS.
If you have a pre-upgrade backup, wipe and restore that. (You cannot restore a backup from newer to older!)
Links to more info:
Intro to macOS Recovery - Apple Support
Create a bootable installer for macOS - Apple Support
Erase and reinstall macOS - Apple Support