Nope, this was on Mojave. Also that was the exact (and very unhelpful) error message "This app can't be opened". I don't believe this is the usual key signing error you get for unverified apps, because that has a "because the developer couldn't be identified" on the end of the error. This error, which I've had before from itch games, usually means something needs to be set executable, but isn't
Interesting. I've done a bit of research on this and the only thing that keeps coming up is something telling me to run chmod to set it as an executable but I can't do that on a PC. I'll rope in a friend who has a Mac and see if I can figure out the problem from there!
Got it. You need chmod u+x on Homing1.1_Mac_KBM.app/Contents/MacOS/Homing
Then it runs. The app bundle itself is already executable, but I that file needs to be as well
Thank you! I think this is unfortunately something I can't fix in the build, not sure why building to Mac from a PC in Unity is so touchy but alas.