Terminating QtCreator (on macos) does instantly close and not save any unsaved files. 

Thats the behavior I expect from SIGKILL but not from SIGTERM. 

From SIGTERM I expect a regular quit as if I hit CMD+Q – i.e. I will get prompted to save or discard unsaved files. 

At the very least I expect it to write a journal and restore it as unsaved file on next start, but I guess the former is easier to implement.