I’m current running macOS Mojave on my MacBook Pro, and want to set up a dual boot with macOS Catalina so I can test it out before I “officially” upgrade. I’m following Apple’s instructions here, ...
I got a Mac Mini several years ago that came with Catalina. I hated the new look of Big Sur, so I never installed that. I now want to install a newer MacOS (Monterey), but initially and perhaps ...