I really don't know what the issue is... What macOS version do you use?
10.12.6 MacOS Sierra
Thanks for the info. I'll take a look and try to find the issue.
Hm. So I read a lot about the GameMaker engine and its problems, did lots of testing but I cannot find an issue. I used El Capitan for testing and it works fine. Seems like this problem can't be solved properly. I am really sorry.
