Unity Player mac requirements
- macOS: Sierra 10.12 or newer
- CPU: Intel x64 with SSE2 instruction set.
- GPU: Metal capable Intel and AMD GPUs
- Officiall Apple supported GPU drivers.
Unnotarized builds mean macOS must be set to Allow apps downloaded from Anywhere instead of App Store and indentified developers. Unless the user adds an exception via finder.
Other source of problems: zip files authored/modified on Windows do not preserve execute-bit of the binary inside. This includes renaming files inside the zip.