My computer updated to 11.5.2 and has not booted since. It has been over a month and still no luck. I cannot access my stuck to backup to erase it and start over. Very frustrated, I have tried everything and still not luck. Starts in safe mode, but my stuff is not there to back up. Need assistance. Took it to the apple store and they said they could fix it but it would wipe all my stuff away. This is ridiculous