10.13.2 supplemental update hangs on Installation is in Progress

To all people with the supplemental update hung progress bar...mine was filled 100% and I waited about one hour to no resolution...so what I did was power-shutdown the Mac and turning it on again...still stuck...

So here's what worked: power-down the Mac, turn it on, when you hear the bell immediately press CMD+OPT+P+R and keep pressed these four buttons until you hear the bell again.

That's PRAM reset, for those who don't know about it.

My Mac went all the way to the login screen this time, and I could confirm by verifying Safari version 11.0.2 (13604.4.7.1.6) that the supplemental update was installed correctly ( see About the security content of macOS High Sierra 10.13.2 Supplemental Update - Apple Support ).

It worked for me after people made some suggestions. So, here is what I did: I pushed the power button, then I held down the command-r and after a while the recovery panel appeared. But then I thought what if the supplemental update actually installed (and it was just stuck from restarting)? So instead of selecting to re-install the macOS High Sierra I went to the Restart under the Apple menu. And guess what? The progress bar reappeared and the process completed! I checked that the Supplemental Update had installed ... and it did!

Reinstall El Capitan or Later Without Erasing Drive

Please be sure you back up.

1. Restart the computer. Immediately after the chime hold down the Command and R keys until the Utility Menu appears.
2. Select Disk Utility and click on the Continue button.
3. Select the indented (usually, Macintosh HD) volume entry from the side list.
4. Click on the First Aid icon in the toolbar. Wait until the Done button activates, then click on it.
5. Quit Disk Utility and return to the Utility Menu.
6. Select Reinstall OS X and click on the Continue button.

Also, see this User Tip: Basic Steps for Upgrading OS X.

FWIW. I just tried this supplemental update this morning with my 2014 Mac mini. I came across the same issue that you experienced with being "stuck" at the "Installation is in progress..." stage. Similarly, restarting the mini, brought up the same screen. My resolution was to perform a recovery mode re-install of macOS High Sierra.

Instead of trying it again, my tact is to hold off until Apple addresses this.

FYI I started this same update just over an hour ago on a late 2015 iMac. about 15 minutes into the update, i too was thinking that the update had "hung". I also considered powering down and restarting, but the question (What happens when you interrupt an OS update?) really concerned me. I didn't really want to think about having to reinstall OS X and possibly restore from time machine backup. While searching for potential solutions in the support communities on an older iMac, I glanced over at the updating iMac to see there had been some progress in the installation. This was very reassuring, I left it alone. It rebooted a couple of times during the update, and I had to enter my login password once. Total update time in my case was a little over an hour.

Glad it worked for you guys!

I was installing this update on a Mid 2013 MBA and let it sit overnight. Came in to work in the morning and the bar was filled all the way but it never finished. After restarting the computer would not finish booting. Tried Safe Mode, Startup Manager, and even Disk Utility to check the hard drive. Ended up reinstalling 10.13.2 altogether.

That worked but the supplemental update was still in the App Store. Round two of installing right now. Hopefully this time it takes.

Just installed this update, it did take a long time.

Downloaded via the AppStore, took an hour.

Then Mac Restarted, had white screen with Apple logo for about 40minutes, then seemed to stop at about 75 percent

and stopped. Left it. The went to black screen with white Apps logo and a countdown of 16 minutes.

After 16 minutes back to the desktop, and all the ironing was done.

I'm on my 2016 MacBook Pro 15" and it hangs at the beginning of the install. Hardly any progress bar. I've tried three times...called support on the first try after it hung for almost 2 hours. They told me to restart the computer and reset the PRAM. Did that and same thing happened. I will wait for the next release to update, I suppose.

Ive had the same problem. Upgraded to Sierra... my screen started acting weird. I would boot up into a black screen for 15 min. Then went to High Sierra ... the update bricked my Macbook Pro Retina!

Nothing would work. I couldn't boot off recovery,the laptop was dead. I tried every trick in the book. Smc,Pram...etc .

Finally I made a recovery drive on an external drive with Tech Tool Pro.Was able to then boot into the Tech Tool Protogo and run tests. The drive was fine, hardware and ram good. So i wiped the drive and reformatted . Then I made a boot drive off of El Capitan and reinstalled El Capitan. It took me a week to figure this out. I even went to the Apple store and they said my logic board was fried and wanted $700!

Common Apple! this is crazy. Your software broke my Laptop. I am a Composer for Tv and Film ... I rely on these tools to make a living.

I got the Macbook Pro up and running, but I still have this weird anomaly, where it boots into a black screen for 10-15 minutes, then turns on. This is very discouraging. I've been using apple products to score Film and Tv projects for years. It may be time to make the switch to PC based Daws and there powerful computers.

DONOT shut your Mac down while updating.....I did and now have a corrupted OS.....CMD R does not even work....

Apparently patience is the key...my mid-2006 MAC Mini took about an hour. No known repercussions from an impatient forced restart at the 10 minute mark.

Have faith in Apple.

It does take quite a long time to install which means there is more

to it than just a Safari patch or two. Some especially scary moments

when seeing progress bar jump back, black screens, gray screens, etc.

Eventually all was well.

About 10 minutes on a 2011 MacBook Pro and late 2013 27" iMac.

Both with aftermarket SSD. I expect my 2010 Mini I use as a server to

take a bit longer (it also has SSD).

For Sierra, it was just a simple Safari update. Done deal.

I also have a 2011 MBP with a Samsung SSD running High Sierra. I was one of the ones who could not get .2 to install, still shows me at .1. Looked in App store update and no High Sierra .2 supplemental one showing.

How did you get update? Seems like lots of issues around these security updates?