Hi @Anonymous 

Autosaved drawings on Mac are located in /Users/YOU_USER_NAME/Documents/Autodesk/Autosave folder. You can try to look for the last autosaved copy of your drawing there.

>>>>>Any idea what "Exception in acexperience.bundle. ARX Command means"?  It no longer shows when I open AutoCAD.

What AutoCAD LT version are you using? And what macOS version do you have on your Mac?

You may need to instal latest Update to AutoCAD LT.