Hi @Anonymous,
I see that you are visiting as a new member to the AutoCAD for Mac forum. Welcome to the Autodesk Community!
This error occurs sometimes when an OS upgrade is applied. Some settings can be corrupted during the operating system installation and the only feasible recovery method is to uninstall and then reinstall your application.
If you have not done so yet and still need assistance, please post back so I can jump in.
The current version of AutoCAD LT for Mac 2017.2 can be found here.
Please select the Accept as Solution button if my post solves your issue or answers your question.
John Vellek
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