Gee, thank you! Kinda like duhhh. What I should have asked.....Is there a
location when a person downloads AutoCad for Mac for the first time, and
when that person does not signify where to save a .DWG, where does AC
place/stores/saves to- drawings? Is there a std factory setting location
when storing .DWG, i.e., a STANDARD location?

Hi,
>>>>> Is there a std factory setting location
when storing .DWG, i.e., a STANDARD location?

The default location on first launch is Documents folder inside your Home folder on Mac.

Start here https://nektony.com/blog/mac-home-folder and here for a good tip https://www.cnet.com/how-to/how-to-find-your-macs-home-folder-and-add-it-to-finder/

Then if interested read this to get familiar with MacOS folders https://support.apple.com/guide/mac-help/folders-that-come-with-your-mac-mchlp1143/mac