I just purchased a new Mac Studio and installed StartCraft 2 without issues.
I can play start craft with no problems.
I have three monitors. _ have try with just one Monitor plug in - same error message
Error message
StarCraft II has encountered an error while initializing your video card. Please try starting StarCraft II again or restarting your machine. If the problem persists, for more information, consult our support website at Blizzard Support.