Hdiutil convert /tmp/Monterey.dmg -format UDTO -o ~/Desktop/Monterey.cdr Sudo hdiutil detach /Volumes/Install\ macOS\ 12\ Beta (-force if needed) Sudo /Applications/Install\ macOS\ 12\ Beta.app/Contents/Resources/createinstallmedia -volume /Volumes/Monterey -nointeraction Hdiutil attach /tmp/Monterey.dmg -noverify -mountpoint /Volumes/Monterey

hdiutil create -o /tmp/Monterey -size 13350m -volname Monterey -layout SPUD -fs HFS+J Once you have your Install macOS 12 Beta app, follow the below steps one by one. After trial and error this can come down to just over 13GB. The whole process took about 5 minutes in a Big Sur VM, and my terminal output looked like this.

Hat tip to Frederik Abeloos – the Travelling Tech Guy. I also have to do this from a VM as my work managed Mac blocks me from installing Betas, and copying around the ISO is more reliable than the. Once you have downloaded the Install macOS 12 Beta.app, I find it useful to convert it to an ISO before loading in Fusion. So if you’re trying to get Monterey working in VMware Fusion and having some issues, read on! MacOS Monterey was announced on the 7th June, and of course like good Digital Workspace people we were right into testing mode! during initial Fusion testing we were running into some fun errors/delays, which we have worked out and documented here.