Yesterday I installed (or rather, attempted0 to install 10.13.4 on my work Mac, a mid-2013 15". It got about 7/8th of the way there based on the status bar and just stopped. After a number of hours, I powered it off and back on. Same thing. Comes up stuck in the same spot. This morning, I reset the PRAM and rebooted. This time the bar went to 100% but now it's stuck there. Not sure what to do at this point. Suggestions? Thanks!