Macbook Pro, 13-inch, 2015 won't update with Catalina
I can't update my MacBook to Catalina 10.15.6.
When I click on "restart" to begin the update, it will go through the whole process of shutting down, restarting, etc.. but when it all comes back up it shows the update never happened.
No message. No "update couldn't be installed." Just back to where I started as if I never attempted the update in the first place. I've got about 10GB of free space.
Does this sound like a reasonably easy fix to anyone?
MacBook Pro 13″, macOS 10.15