Autodesk just released three service packs for the Mac versions of AutoCAD and AutoCAD LT. In addition to resolving issues reported by the Customer Error Reporting (CER) utility and other general problems identified since the previous versions were made available, these service packs add support for OS X 10.8 (Mountain Lion).
Playing in the Sandbox
New Apple guidelines require that software packages installed on OS X 10.8 (Mountain Lion) meet certain security standards. These restrictions mean that you may be unable to do a fresh install or re-install of your existing AutoCAD for Mac products on OS X 10.8. In that case, depending on your product, you should either download the full version of AutoCAD 2012 for Mac or download the trial Mac versions of AutoCAD 2013 or AutoCAD LT 2013. These downloads have been updated to include the latest service packs and conform with new Apple security requirements.
Note: The service pack for AutoCAD LT 2013 is not for the AutoCAD LT 2013 purchased from the Mac App Store. That version will receive the new updates directly from the Mac App Store when it becomes available.