What do I need to do to be able to run a supported version of Maschine Mk3 on my computer?
Thanks in advance.
Mike
It seems your Mac is too old to run a newer version of macOS. I had a similar problem with my mid 2014 MacBook Pro, where macOS Big Sur was the latest supported version. Apple supports Macs for 6 years from release on. Then the Mac won't get no further new macOS version, but each macOS gets security updates for 3 years.
So in your case you won't get any macOS updates at all, because Catalina is no longer supported.
You have two options: