I created a new user on my macbook for my girlfriend when her laptop broke, and she could see my files in the “Recent files” tab. I’m not even sure if there was a separation of files. And I have no clue what the intended boundary is supposed to be between users.

I made a new user for Zoom screen share and was equally confused when my personal files and info would show up in searches and such. And it seems like most things install globally?

Ended up using a whole new computer to have a clean screenshare environment.