![]() ![]() ![]() Solaris supports a feature called Boot Environments which allows the system to run normally off of one BE while installing a OS update into a new BE. Apple should do something similar to what Solaris (Unix OS) provides for installing OS updates. In general, Apple could/should make rolling back a major macOS update much easier and reliable. When everything looks good running the downgraded macOS, delete the “Install Monterey” app (or whatever the downgrade version of macOS is) in /Applications to save around 13GB of storage.Note, all this can take a long time (5+ hours, or longer, like 20 hours if restoring from a TM server).In particular, all of the folders I was sharing, including a folder used by the TM Server, were no longer shared. Note, after I did the Migration Assistant restore from my TM backup I found a number of things were not set up as they were when I did the TM backup. When that’s done, boot normally, login and run Migration Assistant and restore the more recent TM backup for the level of macOS installed.See: Mac startup key combinations - Apple Support for boot option key combos. ěoot off of the bootable install USB drive.On Monterey it in sysprefs preferences.Įrase your Mac and reset it to factory settings - Apple Support ![]() On Ventura this is in the sysprefs->General->Transfer or Reset panel. Run Migration Assistant and see if it lists the backups on the TM backup drive Make sure there’s a recent TM backup using the macOS version I’m downgrading to.Note that searching for “macOS Monterey” in App Store doesn’t work so use this link to get to the macOS download: How to download macOS - Apple Support How to reinstall macOS - Apple Support How to reinstall macOS Here are some important references:Ĭreate a bootable installer for macOS - Apple Support Creating a bootable install drive Ĝreate a bootable install USB for the macOS level to downgrade toĪpple didn’t make this easy.Here are the steps that got me from Ventura to Monterey: ![]()
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