The developer determined the problem is with Rosetta, Apple’s translation layer that is intended to support Intel compiled applications like Rhino V7 to run on the Silicon Macs. Their code is pretty buggy.
To work-around the bug in Rosetta, we had to add a bit of code that we were able to remove for all other platforms for faster performance.
This tool will be turned on only for Mac Rhino V7 SR21 (and newer) when running on Silicon Macs. The performance hit should be minimal.
I am testing the fix now.
I’ll let you know when it’s ready to go.
Thanks for looking into this John. I am having the same problem since upgrading macbooks. The old macbook opening the same file on the same version of rhino doesn’t experience the issue. Looking forward to the fix