For Apple Silicon users: you can force the instance to run under Rosetta. This is handy for MIDI Guitar 2.
Why? If you need to run the VST version of MIDI Guitar 2, i.e. if you want to connect MIDI directly rather than use the virtual ports of the AU, which will only run under Rosetta.
Main benefit is being able to run your primary Gig Performer natively, without the translation overhead of Rosetta.