You should give us a Print-screen please 
Yes, if you could post some screen shots and maybe give a little bit more explanation, that might help. Is it simply that you click on "Save current settings as preset..." and you get a crash? What version of AutoCAD for Mac do you have and what version of the Mac OS are you using? Are you able to send in a crash report when the crash occurs, with your email address on it? I might be able to look it up.
Bryce Thelin
AutoCAD Product Support