Game crashes on my mac

[Medusa]

You complained about a ban before you made this thread so i guess AC worked fine before you got this problem.
What did you do/change between that post and this one?

Delete all AC files and install it again.

Not sure where your folders are but mine are here:
/Users/danielle/Library/Application Support/assaultcube_1.2r
and
/Applications/assaultcube1202

Edit:
Just found this post, maybe you can try whatever you did to fix that one.