What I want to archieve:
- I want to remove a "dead" (old) account from iMessage, so it stops asking us to login with no longer known credentials - on every boot up of the workstation
Circumstances:
- The account password is not stored on the machine
- The password is not known anymore, I forgot it
- The account cannot be recovered in this case, please consider this as fact.
- The remove button [ - ] (screenshot: bottom left) in iMessage is disabled.
- (Thus it seems impossible to remove the account for me? Please help.)
Operating System: macOS High Sierra 10.13.6, update not possible, we sadly need to use 32bit software in our company that is no longer maintained nor updated. Apple does not care much and ditched support on it.