It seems the problem is that new version of unity signs app bundles and any changes break it. You need to right click it and press “Open” or do xattr -d com.apple.quarantine ~/Downloads/Out\ of\ Touch.app in terminal for it to work. I will try to see if there are any workarounds for that. Also because of unity upgrade minimum supported mac version is now 10.15 sadly, if yours is lower you might want to try running windows version using wine.