MacType and MacCreator still exists in the Language Reference and in the IDE.
I was thinking these were deprecated in OS X (Yosemite 10.10.5 running). This is confirmed each time I poll the Finder for MacType and MacCreator (using AppleScript).
Now, I want to know what MUST I place in the IDE, in the File Type Editor MacType and MacCreator fields.
b. " "
BTW: I will not add a bug feature for my usual reasons and because they have so many things to do in their plate
Select the third defined File Type (in the set) and press the Return Key. Guess which line will be selected ?
(answer: the first line !)