an unknown error has occurred

Looks like I am being plagued by the same issue, as well as gent, and countless others across the forums . I am using a MacMini, purchased in 2011, running OSX 10.6.8 and attempting to update to 10.8. I tried deleting caches and cookies and rebooted the computer many times, Doubled-checked the date and time (2), tried logging off and back on, disabed the firewall (2), repaired the disc permissions.

Formatting is not an option, as it would only further complicate the ugrading process.

Did you ever find a fix to this issue? I am still looking as well, but if I come across anything I will post it here.

Hey Grillman!

I was able to fix the issue without having to format, so don't go down that road just yet!

At the time of writing this reply, I am using my computer at the office. Once I get back home to my Mac I will update this thread with the exact methods and workflow I used to correct the issue.

The process was similar to what some other users suggested, however there are a few key points where you need to restart the computer, and rebuild file permissions. Once home I can provide you with the correct procedures to fix this issue.

I should ask, are you too having issues with the Onboard NIC. The reason for asking is that one key issue that I was having was that the onboard NIC had been fried in an electrical storm, and that I was forced to use wireless as my only means to connecting to the network. If not, the same process will probably work as the procedure includes completely removing the App store and reinstalling with the latest version.

Hi, same problem here, using OS 10.8.1. iTunes store working, iOS store working, MAS just says "an unkown error has occurred". No error number. Software update through MAS does work.

@Debian: would be great if you could provide your solution to this problem

update:

- restoring the "App Store.app" from a time machine backup does not help

- accessing the MAS from another user account on the same machine works -> problem is located somewhere in the user library

Debian00

I also had my onboard NIC go out recently and switched to the wireless connection. I'm not sure if that's when my app store error surfaced. If you found a fix for the app store issue, I sure would like to try it. Thanks

I managed to update my apps by using another user acc. on my MBA. It worked, but not the way it's supposed to.

I have tried EVERY single piece of advice here on the forum without success... annoying to say the least!