I have AutoCad 2014 for Mac.  I recently did the system update for my computer and that is when all hell broke loose.  I needed to "Reinstall" 2014 to my computer.  However, at the moment every time I go to Reinstall a warning pops up that Autodesk 360 is running in the background and I first must close that in order to proceed.  It is NOT running any place and even when I open it there is no way to close it.  Therefore 2014 cannot continue it's download.  I also still have AutoCad 2011 on this Mac, which for some reason will not let me Un-Install that version.  All very strange.  And this new Mac update still supports AutoCad 2014 so its not an issue of no longer fitting into this operating system.  

Any suggestions??