Hey @Anonymous, 

Look to the steps below from this AKN article. 

AutoCAD for Mac 2014 SP1 and later:

• Click the Window menu and choose Reset Palettes or enter RESETPALETTES on the command line.

• Hold down the Shift key while starting AutoCAD for Mac.
• In AutoCAD for Mac 2015 and newer, you may click the AutoCAD (or AutoCAD LT) menu and choose the option to reset the program.

• For all versions of AutoCAD for Mac, do the following:

1. Click Preferences under the AutoCAD menu.
2. Click the Application tab.
3. Click the button "Reset Application Options."
4. Click "Reset AutoCAD."