[2022] [Mac] error message on startup from steam

This may be a bug in the launcher, which seems to require MacOS 12 now. Were you at all thinking of updating MacOS? If so please do that and confirm for me that it helps, then I can report that to the developers.  

renno621 said: Thanks for getting back to me,
Unfortunately I am unable to update as I do not have administrator privileges on this device. It may be a while before the organisation decides to update systems. Thank you for the assistance though.

Sorry about that! 2022.12 came out the other day but I don't think this was fixed in that update.  

Nixou said: Is the launcher Paradox' or Steam's handiwork?

The Steam-branded client/launcher is Steam's, when you hit PLAY there the Paradox-branded launcher that then starts is Paradox's.