AutoCAD 2015 LT for MAC pinwheels everytime I copy/insert/paste or any other additive function. I'm using a MBP 15" mid 2015 running 10.11.6. AutoCAD is up to date and this problem started happening about a week ago. The only thing different is that I added a Mini-display port to Dual DVI adapter for a Dell 3007WFPHC