Igor Pro needs Rosetta 2 on Apple Silicon Macs

Rosetta 2 is necessary if you want to be able to run Intel x86 apps like Igor Pro® on new Apple Silicon Macs, such as the M1 MacBook Pro, MacBook Air, or Mac mini.

Rosetta 2 is not installed by default on these Macs.

Install Rosetta 2 onto the Apple Silicon Mac by following the instructions here or here.