macOS RestartAppIfNecessary not behaving as documented

[riftweaverAndrew]

Hi there, we've been having issues with implementing RestartAppIfNecessary and SteamAPI.Init on our macOS builds. We use deeplinking which will launch the base standalone app, which in turn should call RestartAppIfNecessary to close the base standalone and reopen the app in Steam. This works as expected on Windows, but on macOS calling RestartAppIfNecessary will instead attach Steam to the running standalone app which is already in the process of closing. We could work with this by simply not calling Application.Quit(); for macOS builds only, but then once Steam has attached to the running standalone app, calling SteamAPI.Init(); will always fail.

Is this the intended behavior for macOS, or has something changed?