Updated my Mac (not Catalina, just normal security update). And it got stuck for hours on the progress bar. Restarted and now it’s totally dead... what now?pic.twitter.com/Js2XX3Nf0Y

Updated my Mac (not Catalina, just normal security update). And it got stuck for hours on the progress bar. Restarted and now it’s totally dead... what now?pic.twitter.com/Js2XX3Nf0Y