Yeah we haven't done the code signing that Apple requires as it's just a jam project. When WebGL is added to Godot 4 it'll be more friction free for jam games on Godot. For more serious projects we'll do the code signing though (just assuming that this is the problem, apologies if this isn't the reason for the issue)
UPDATE: Looks like the mac one doesn't support intel macs >:(. That makes sense now that I think about it, will have to look into it