Hi @Anonymous,

I am sorry that you are having these issues with AutoCAD for Mac. I run three different versions along with LT product and honestly, I have never had it crash or lock up.  I don't think this is a hardware issue so that leaves us with possible driver errors or conflicts perhaps with other applications that you are running concurrently.

I suggest that you launch the Activity Monitor and see what else is running during a normal AutoCAD session. That might help to track down what is causing this behavior.

I would also like to see if this is perhaps drawing related as @maxim_k suggests.