Use createinstallmedia utility to create the installer on the mounted volume.Hdiutil attach /tmp/Catalina.dmg -noverify -mountpoint /Volumes/Catalina Hdiutil create -o /tmp/Catalina -size 8500m -volname Catalina -layout SPUD -fs HFS+J With Catalina as an example, run the following commands.
Using either method in the previous step, there should be a Install macOS. The important thing is /Applications contains a file called Install macOS Catalina.app (or other version).Īlternatively, an installer can be downloaded with Munki’s InstallMacOS utility (but I didn’t try this) mkdir -p ~/macOS-installer & cd ~/macOS-installer & curl > installinstallmacos.py & sudo python installinstallmacos.py If it mentions that the version is not suitable to be installed, it doesn’t really matter.
For example, I want to download Catalina.
There are links to download from the App Store at.
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