Here are the devices that can run the latest macOS
https://support.apple.com/en-us/122867
Also worth noting that PrivateTranscriberPro only will work with the M series macs. Intel based macs won't work.
Basically it should work with all M1/M2/M3/M4/M5 based macs, which means you need to have a Mac from at most 2020 (mac mini M1 is the oldest one to be supported)