Problems installing 10.15.3
I have a late 2015 iMac running 10.15.2, but every time I try to update to 10.15.3 it crashes, and displays the screen below. If I choose to restart it asks me to select the startup disk, then restarts fine.
I have plenty of space on my hard drive (approx 1 TB), I’ve tried rebooting in safe mode, and I’ve run disk utilities and found no problems.
I’ve also tried using the combo updater, which resulted in the same problem, and I’ve tried reinstalling from the recovery disk but it crashed.
I’m completely stumped about what to do. Any suggestions gratefully received!
iMac 27", macOS 10.15