About Mac histories of programs? My friend asked me a question about "Is it possible to check what programs you open and you made" and I didn't know if its possible or not so I want to ask you if its possible or not.

Like how can you find out what you did on a Mac and delete the history or edit something on it.
The closest thing is the "Recent Items" lists in the Apple menu.

There is more detailed information in /var/log/system.log but it's not easy to parse.