My mac says it's running on 14.3.1? Idk if it's just because its a new system but thank you for trying to help!
Thanks! We've recently had confirmation that it can run on 15.1.1, so being new probably isn't the issue after all. Having searched it up, it may be an issue with the Architecture settings when building it for Mac (32-bit vs 64-bit.)
If I can ever find the time I'll have to redo the mac build with the right Architecture settings (and even then it might not solve the problem!)
Either way, this was informative as the full release approaches. Thanks for getting back to us!