10.13.2 supplemental update hangs on Installation is in Progress

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.

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.

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?

Now at 9 hours at 75% progress. How much patience? Noticed that the MacBook Air fan is on that medium level and has been since this morning. I assume that this installation process is full proof or is that fool proof!?

Mine did not work out. Progress bar got all the way complete, then hung. Tried re-installing OS via CMD-R boot, same thing happened, and this time was overnight (7+hours). This is a Mac Mini I bought two weeks ago. Will try re-installing previous version tonight

Tried it again last night tried. Restart from CMD-X screen, reinstall OS, basically everything people have suggested. It hangs when the scroll bar is complete. That was at 9:30pm, at 7:30AM, it was at the same point.

It's going back to the store tonight. its Apple's problem to fix now.

2017 IMAC 27Inch 4.5 1.7 same issue... just hangs at 75 percent, did not want to burn in my screen with that logo of the apple, and calculating time message......

This stinks, I just got this machine... called apple care the first time, they had me reinstall the operating system. but the update still hangs again.....Guess I can't update my apple anymore... this may be my last iMac....

I’m having some of the same issues. Update goes all the way to the end of the progress bar and hangs up. I’ve tried everything, including installing from a bootable disk. Looks like everything is fine, but gets to end of the progress bar and hangs.

I’ve allowed it to go overnight twice and no luck. The last Apple support person I talked to told me I was out of luck and to go find someone that can recover my data from the hard drive. Thanks a lot apple.

I might try to load El Capitan and see if that works.

With all seriousness: when is apple going to fix this incredibly annoying problem? Have they even acknowledged that this is so fundamentally and ridiculously broken yet? I'm sitting here waiting for another (who knows how long this time) for a 40MB update to be applied. Why is this a problem? It's literally been like this with every single update I've run so far. This was a clean install of High Sierra.

At this point, I'm just going to downgrade back to El Capitan, because this experience with Sierra, and now High Sierra has been TERRIBLE.

Stop it if you can. Adobe did an auto upgrade on my 2011 27” iMac, went into reboot loop, anything older than 2-3 years and it totally screws up your machine. Stop it if you can, seriously it’s not compatible

Same issue on a 2013 iMac. I rebooted once and quickly got back to “Installation is in progress. Calculating time remaining...”. Computer is totally quiet - can’t hear any fans or disk drive whir.

I have a 21.5" iMac (late 2013) -- the update took over 45 minutes to install. It seemed to spend most of that time "calculating time remaining."

It took almost an hour, but the installation finally completed on my iMac.I don't recall even a major software update taking quite this long to install...