macOS High Sierra 10.13.5 update won't complete

[patent10021]

macOSHhigh Sierra 10.13.5 update won't complete download

Always finishes at 100% but then the button turns to UPDATE again. Then when I click update again it restarts the update starting at about the 1.7GB mark and completes 100% then around in circles we go. I've restarted and logged out/in etc. Currently 10.13.4 (17E202).

I'm in China but that shouldn't matter. I've even tried updating with VPN. All other Xcode updates etc work fine.

EDIT: So now one time the button actually said INSTALLED which is weird because even if I did downloaded it I never restarted so there is no way it could be installed. But alas after I did restart to test, the button turned to update again. It still isn't installed. The update is starting again from about 1.7GB.

 

[djphat2000]

You may want to reboot (without doing the update).
Do the P+R+CMD+Opt keys to clear out the NVRAM. Do it a few times. A couple of "dong" sounds from the speakers.
Then try the update again.

I had an issue too not being able to update my MacPro and iMac. It would just not do the upgrade. Only reboot or log out and do it all over again. After I cleared the Nvram it worked. It actually installed after i stopped clearing it. It just went into into the update without having to log back in and download it again. Took about 20 minutes to finish, but it went.

 

[kohlson]

You may want to try downloading the Mac OS X 10.13.5 Combo Updater. Much larger file. But it seems to have fewer issues when updating, at least for me.

 

[Fishrrman]

Suggestions:

1. Download the 10.3.5 combo updater:
https://support.apple.com/kb/DL1965?viewlocale=en_US&locale=en_US

2. Power down.

3. Reboot to a "safe boot" (hold down shift key at startup).

Does this work any better?

 

[patent10021]

Thanks guys. Your tips will help future readers I'm sure.

In my case after about 10 tries I gave up. I was doing something else then a long while after my Mac reboots by itself. This isn't just a case of it needing time to install/update. It's a really odd one. It never even gave me messages. I'm wondering if updating in China with a non-Chinese Apple ID actually might have an effect. Been here for a long time but always update in Japan or other.