Strange System Language bug with OCLP - I think it doesn't work with partially supported languages!

* Do not test this with an account you care about as you will get locked out *

I recently installed OCLP Sequoia 15.5 on a Macbook Pro 2013. Everything in English works fine.

  1. Create a new test account
  2. Go to system prefs > general > preferred languages
  3. Make a partially supported language primary e.g. Yoruba (or any not on this list: https://www.apple.com/macos/feature-availability/#system-language)
  4. Log out
  5. Log in

The log in will show a black screen, with a cursor and nothing else.

Anybody know why this is?

Author: @tornado99_