Along with that update Apple released a security update for HS along with a Safari update. Any idea if those are kosher?
I’m waiting to install on my main work Mac. I tried the update on an old 2010 15" MBP I have at work and there although the update appeared to complete, after rebooting twice it got stuck in a loop where it would boot to only show log files and offer to either restart or shut down. It claimed the update hadn’t completed.
It took me a while to figure out that I could only get it to fully start up if I tried a safe boot. That got me into Finder where I was able to launch the MAS and see that it was still offering the update. Selected to install it again and that time it ran through all the way. Rebooted twice. Second time it got me all the way to Finder. Never seen such behavior before.