White screen after 10.11.3 update, weird fix

[John6Plus]

So I updated my 2011 Mac Mini to 10.11.3 yesterday (after it went smoothly on my 2015 rMBP and and my wife's 2011 MBA). When it rebooted it just came up to a white screen. Cursor worked though. Tried rebooting to recovery and running disk util, nothing, and finally tried reinstalling the OS.

A couple hours later, after the reinstall rebooted, it was at the white screen! I was mildly pissed. Then, just for giggles, I tried connecting via screen sharing from my MBP and I got the login screen. Logged in and it immediately rebooted, coming up normal on the display.

What kind of idiocy is this? I no longer had it automatically log anyone in (me and my kids have separate accounts), and it looked like even though it was in the middle of an install it needed me to login first, but without letting me see the login screen. How on earth would I have fixed this if I didn't have a way to connect remotely? Or if I just never thought of it? (It looked well and truly crashed.)

 

[ashleykaryl]

I may have the same problem here with an old iMac that suddenly has a white screen following a security update with El Capitan and I'm wondering how you managed the screen sharing. My other computer is a Mac Pro running High Sierra and it may be a problem that both computers are using the same Apple ID username. When I try to login I just see my own picture appear with a message saying it is waiting for a response.