Kernel Panic loop?
Was using my iMovie and plugged in my camera to upload vids to iMovie. Whilst deleting files so I could make room. MACBook Pro (2015) shuts off all of a sudden. Screen comes up with the classic "computer needs to restart" and so on. This went in a loop. Showed up five times then showed a circle with a slash through it symbol. Then shuts off.
I have tried safe boot, option power key, command R. The only thing that has made the "restarted Mac" go away is when I did Option, command, P + R to restart whatever it's called. But now I'm still on a loop of the apple logo showing up loading halfway 5x then shutting off.