Hi Elizabeth,
We’re glad you were able to identify the root cause of the issue. For future reference, you and your collaborator may want to consider using Unity 2021 for your ARDK project.
Although ARDK doesn’t officially support Unity 2021 just yet, using the Apple Silicon version of Unity 2021 on an M1 Mac removes the need to install the patch and should result in a project that’s compatible with both of your systems. Additionally, we haven’t identified any major compatibility issues between ARDK and Unity 2021 at this time. You can read more details about this announcement in Amanda’s post here.
Thanks for responding, and best of luck with the continued development of your project.