10.13.2 supplemental update hangs on Installation is in Progress

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.

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 ).

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.

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?

Every setup seems to be different. I have my mid-2012 MBP with me now and it only took 5 minutes from the time it restarted to where I could open Safari. Startup did seem slow though, but at no time did it seem like it was hanging.

There was one oddity I ran across when updating my 2011 Mac Mini

that I use as a media server/HTPC.

My three other Macs went through the usual update type screens (with some

of the "scary things" mentioned in my earlier post. However, the 2011 Mini actually

displayed a High Sierra install splash screen for several minutes during the update

before returning to the usual update screens. It still updated properly and is working

fine, just quite odd.

On my old 2010 MBA the update installed very quickly, but on my 2014-ish (not sure) iMac with Fusion drive the update also took about 45 minutes.

No reason to get alarmed, on my computer the message "...calculating time remaining" was show for a very long time and the update progress bar seemed stuck at roughly 3/4.

Just hang in there, it'll work out.

Actually, closer to 5 hours. No sound from the 2010 MacBook Air. Progress bar is at around 75% which is what it was right after the update started so there has been no outward progress for the 5 hours.

No, I didn’t boot into safe mode. I have only the basic Apple software applications and have never had an issue until this ‘lengthy’ update. All software was up to date prior to this security update.

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.

I initially panicked a bit when the installation seemed stuck, and shut off my computer but pressing and holding the power button.

When I restarted, it took a couple of minutes, but then it launched straight into the installation again, and it again zoomed to about 3/4 on the progress bar.

By that time I had found this thread and decided to just wait and see what happens. In the end, as I wrote before, the installation eventually succeeded and it took about 45 minutes.

Was I lucky, of are some people just having bad luck? I don't know.

Thanks for the information. This appears to affect 2014 Mac minis with Fusion drives as I seem to have a similar setup as you.

To be sure I understand. How long did your installation "hang" at the progress bar? Was this the 45 minutes you stated or are you saying the entire process took that long for you?

Quite honestly, I don't know exactly how long it took.

Maybe the first attempt I aborted after about 20 minutes or so, and then on the second attempt after I restarted my iMac the progress bar immediately zoomed to where it left off.

I then decided to just to work on my laptop and after roughly 20-30 minutes I saw that the login screen had appeared on my iMac.

Like I said, roughly 45 minutes all together.

Yes could be an issue with the Fusion Drive. My late 2010 Macbook Air with an SSD installed the update without a hitch.

My mom has an old (2010 if I remember correctly) iMac with a standard HDD. She has not updated yet, but I'll probably do it tomorrow. If there are any issues I'll let everybody here know.