MacOS: MacBook Pro randomly goes to sleep / screen turns off while typing
This one drove me crazy for a few weeks, and the solution was tough to find, so I’m posting it here. I would be working on my laptop and my screen would suddenly black out and the computer would randomly go to sleep as I was typing. I’d have to hit a key to wake it. I suspected I had a bad reed switch (the magnetic sensor that sleeps the MacBook when the lid closes) or loose connection to it, since it only happened when I was physically typing on the keyboard. However, I couldn’t find a place on the keyboard or case that would reliably trigger the sleep by tapping on it repeatedly.
Long story short: I had forgotten that in OS X’s “Desktop & Screen Saver” system preference, I had recently turned on a hot corner to put the computer to sleep by moving the mouse to it. Unsetting this, so I had no “hot corners” active anymore, solved the problem. No more random computer falling asleep while I was in the middle of working.
D’oh!
Thank you to Stack Overflow: MacBook Air screen turns off randomly for saving what’s left of my sanity.
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