Can i use Mainstage with Catalina on imac 2012?
Can i use Mainstage with Catalina on imac 2012?
iMac 21.5″, macOS 10.15
No. Since the iMac 2012 is not capable of an OS higher than Catalina, and the current version of Mainstage requires Big Sur, which will only run on 2014 and newer iMacs, at least the newest version of Mainstage is incompatible.
Mainstrage has been around since 2007. So you'll want to try and find an older copy of it somewhere for your older Mac.