setting german as operation language

[Ofnuts]

If the problem is that you cannot find German in a list of languages which is in a foreign language, you can try to:

• Stop Gimp
  
• Locate your Gimp profile.
  
• Use a text editor to open the gimprc file it contains
  
• Add the line (language "de") (or replace an existing "(language...)" line
  
• Restart Gimp.
  

If you can read the list but just cannot find German in it, then it must be an install problem because I can set my Gimp to German. I don't know of Gimpp is installed in OSX, but as a guess see if you have a "share/locale" directory in your Gimp installation, and if so is there a "de" directory in it?