Unknown error 8392

Same problem here. And on MacBook Pro 2015, Sierra 10.12.1

This solution works for in I am in Mexico.

Me too. They have advanced my ticket to a senior level and have requested info to take it to the engineers. So keep the ball rolling, if you have any more information then lets get it to Apple and see if they can finally fix this issue after all these years.

I have found it works better if I select each individual updated app and click Update one at a time instead of trying to Update All Apps.

I have the same problem. I'm in Italy.

macbook 12 - el capitain - itunes 12.5.3.17

Happening to me also. I have gone into iTunes preferences and reset warnings and reset cache and it lets a few update and then I have to do it again to get the rest to continue.

Been happening to me for about 8 months. Nothing fixes it

The same as everyone else. This error occurs with approx. 25% of the updates. There several ways to start an app update in iTunes:

- via right click on app icon

- via left click on app icon

- via Update button in bottom right

- via iTunes store

Some may work when others generate the error or all may generate the error. No pattern is evident.

Basically, persistence pays off and the app updates after multiple attempts.

Clearly the issue is for Apple to address. One day it will simply and silently vanish.

Same problem here. If I try to update each and every app individually, it will EVENTUALLY let me after 3 or 4 tries. But that's a pain in the ***.

Same problem here, Macbook Pro running 10.11.6 with fully updated iTunes. "Update all" sometimes allows a few apps to update, sometimes produces the error instantly. Individually updating via right-click eventually is successful. Thanks to everyone who's escalating this issue and gathering more data; here's hoping Apple gets it resolved soon.

I'm getting this for the majority of around 100 apps that are awaiting update in iTunes for Windows 12.5.2. I can't see any pattern to what downloads, and what doesn't. This has happened in the past (months ago) and the solution was to update one at a time - and eventually I've found that even the ones that were "stuck" will then download.

I've been having this issue as well for the last few weeks, but up until now I had a message of Network Connection Timed Out, as opposed to only today having Error 8392, and that made find this thread...

In a way I'm happy because I thought it was only me having this issue!!

I have to agree, Apple's updates lately have all been very hit and miss. iOS updates on the devices themselves require multiple attempts until the update actually starts, then they can take a long time despite fast internet connections, and now this whole crap with iTunes...

Just saw on Reddit someone suggesting the following Terminal command:

sudo softwareupdate --clear-catalog

could help.

Has anyone tried it?

Apple support was also completely clueless about all of this...

I hope this isn't premature but maybe someone at Apple was listening. The problem hasn't recurred for a couple of days now, and for about a dozen app updates.

We'll see.

Update: This is the only response I have had from Apple 11.14:

"The engineers are still reviewing the issue. As soon as I have next steps you will be contacted."

Today seems to be everything ok.

No errors appear when "Update all App". .