If you're running MacOS 10.14 Mojave, be forewarned. I was on 10.14.4 and started having this problem this morning BEFORE installing the .5 patch! I'm having more serious problems now, but that's another matter.
ANYWAY, If you look in System Preferences/Security & Privacy/General/Advanced, there's an option to log out the account if it sits idle for more than X minutes and it defaults to 5! And it's turned on by default! Or at least it was on my computer after installing the .5 update. Needless to say, I have disabled it.
So if you think your Mac has started freaking out, this might be the reason.
My problem is more serious - something got seriously corrupted in my normal user account rendering it unusable, so I'm basically going to have to copy ALL of my user files off to an external drive, delete the account, and create a new one. I only have a 3 TB internal drive, of that I have less than 190 gig free at the moment! I have something on the order of 800 gig in photos, lots of music and video, and a huge ebook library. Takes a lot of space! I wanted a 4 TB internal drive when I got my new iMac a couple of years ago after my previous one was stolen, but 3 TB was the largest available of the refurbs, and I couldn't afford a new one at the time.
At least Macs store programs universally for all users, so I shouldn't have to reinstall any, though I'll probably lose preferences, which is no biggie. I'm just concerned about the potential risk of losing files!
ANYWAY, If you look in System Preferences/Security & Privacy/General/Advanced, there's an option to log out the account if it sits idle for more than X minutes and it defaults to 5! And it's turned on by default! Or at least it was on my computer after installing the .5 update. Needless to say, I have disabled it.
So if you think your Mac has started freaking out, this might be the reason.
My problem is more serious - something got seriously corrupted in my normal user account rendering it unusable, so I'm basically going to have to copy ALL of my user files off to an external drive, delete the account, and create a new one. I only have a 3 TB internal drive, of that I have less than 190 gig free at the moment! I have something on the order of 800 gig in photos, lots of music and video, and a huge ebook library. Takes a lot of space! I wanted a 4 TB internal drive when I got my new iMac a couple of years ago after my previous one was stolen, but 3 TB was the largest available of the refurbs, and I couldn't afford a new one at the time.
At least Macs store programs universally for all users, so I shouldn't have to reinstall any, though I'll probably lose preferences, which is no biggie. I'm just concerned about the potential risk of losing files!