An unknown error has occurred app store

As my problem is on Windows 8, I just tried and equivalent to delete some type of cookie only affecting iTunes... So I wen to "C:\Users\Edmundo\AppData\Roaming\Apple Computer\iTunes\Cookies" and delete the "Cookies.binarycookies" File, then I could Sign-In..

Hope helps someone..
Regards

Thanks to everyone that left input... regrettably, none of the suggestions were able to help me. I performed a clean install with the Installation Disk that came with my 2011 MacBook Pro. It installed 10.6.7, which I then upgraded to 10.6.8 using the Software Update. I was not able to connect to the App Store or iTunes before or after the update. All I'm getting is "One Moment Please. Connecting to the iTunes Store." And it just keeps "Loading..."

I have even tried connecting while using someone else's network, but am having the same results. I've been at this for a couple of hours now. I'm hoping someone that had the same problem will be able to offer a fix soon. I would really like to be able to install Mountain Lion.

Note: I was able to download and install OS X 10.7 prior to doing the clean install, and before having problems with connecting to the iTunes store. I lost the Recovery HD upon doing the clean install. Maybe if I can somehow get 10.7 back on this computer without the need of the App Store, I would be able to connect again? Can I even get 10.7 again without the App Store?

Thanks in advance.

Hi

As a bit of a Mac newbie , I have had the signin problem on my 2012 Macbook air.

When trying to Logon with my Apple ID to the APP store i get the " An unknown error has occurred "

However Itunes and Icloud have no logon issues

I have tried deleting the Network Preferences PLIST , creating a new account and using that to sign in but no luck, along with all the other ideas in the forum.

My Apple ID logs in using my daughters Macbook on the same wireless network, no problem.

My airport card was water damaged so I am using a Nano Wireless adapter plugged into the USB which shows on my Network list as "USB Ethernet" which may be causing a problem?

I thought I had the problem solved by creating a new Apple ID on the Apple website which I then was able to login to the Appstore on my Macbook Air successfully but when I tried to verify the new account I got as far as the credit card details and then it came up with some thing like "Your request can not be completed at the time . please try again later " and despite " trying again later" no joy...

This is getting totally frustrating so any suggestions would be great., I also tried logging into the account on another Macbook and trying the changing country idea but this did not work , and as I can't sign in to sign out if that makes sense!

Thanks

This absolutely worked for me- I tried everything else suggested for over an hour and restarted my computer numerous times-- This answer was the key- thank you sooooo much. I was really getting aggrevated. Thank God for the Apple community and people like you guys who try to help - Heaven forbid you wait on the so called "Genuis" that work for Apple. Grrrrrr

If you can't sign in, there is no sign out link to click. That is the problem. When you type your Apple ID and password and click Sign In, An unknown error has occurred appears in red below the Apple ID box.

In my case, even choosing Create Apple ID doesn't do anything at all. I can log in using iTunes or another computer, but I have 19 updates on my main computer and that is the one which doesn't work. Very frustrating.

Hi ,

Unfortunatley I can't sign in the first place to sign out ...Just get the cursed "an unknown error has occurred " when I try to login. Yet I can sign in on my daughters Macbook no worries ...Grrrrrrrrrrr!

No need to sign in first.

Deleting Library/Preferences/SystemConfiguration and then delete NetworkInterfaces.plist

Restarting. Going to the system prefs/network - saving then launching the app store.

Did the trick for me.

This worked for me - except I would change one word:

Yanik Dhont wrote:

No need to sign in first.

Go to Library/Preferences/SystemConfiguration and then delete NetworkInterfaces.plist

Restarting. Going to the system prefs/network - saving then launching the app store.

Did the trick for me.

My issue was that I have 2 NICs, and I started using the 2nd one after experiencing issues with the 1st. Basically OS X and the APP Store/iCloud/etc. did not like that I had changed from "Ethernet" to "Ethernet 2". By deleting this plist file, then rebooting with NIC #2 connected (and no cable in NIC 1), OS X recognized the #2 NIC as the "Ethernet" and not "Ethernet 2". Kinda wacky, but I am glad it worked.

I cant find "SystemConfiguration" Folder or "NetworkInterface.plist" anywhere in Library/Preferences...Anything I'm missing. This AppStore sign in thing is making me nuts! lol

Running OSX 10.7.5 (Lion)

Hi, I have Macbook Pro 2010 and it was hurt in accident and I lost top case with screen. I want to use it with external screen. I bought USB WiFi and everything works, but I can't log into App Store.

I have still got "an error has occurred". I think the reason is I don't have build-in ethernet or wifi card only USB WiFi. I deleted /Library/Preferences/SystemConfiguration/NetworkInterfaces.plist but it doesn't worked.Oh I have this ASUS USB-N10 wifi adapter and I can see it in ifconfig as en0. In network preferences I have nothing else beside this ASUS WiFi.
BTW when I try EFIStudio / Ethernet / Add Device: I get "Device path not found! Ethernet not available on this machine!".

I recently installed Mac OS X Snow Leopard onto my desktop PC in an attempt to create a "Hackintosh" so that I can use X-Code for a Mobile Development class that I am going to be taking shortly. I updated to Snow Leopard 6.8 and am attempting to sign into the Mac App Store to download OS X Mavericks how ever when ever I attempt to sign in I get a red text message that "An unknown error has occurred." under the Apple ID input area. I have been attempting to self-help the issue with the Mac App Store community support forums, however all the stated solutions are either not working for me, not possible to try due to not being signed into the Mac App Store, or not possible because the files on my hard drive are not reflecting the same information that is in the forums.

Attempted solutions Results:

T&C Does not work, unable to sign in to sign out, loging into

a different Apple ID does not work either, even tried to

go all the way with logging into a different Apple ID, it

says then that, "Your request is temporarily unable to

be processed."

Deleting files The files on my system don't seem to coruspond to

what is listed in this thread or any other thread that I

have been able to find here.

Message was edited by: Otawo

OSX 10.6.8, trying to install the Mavericks update. I have tried several solutions here

1. I can not logout because I am not logged in.

2. Clicking create new apple ID does nothing.

3. In Activity Monitor athe process called "storeagent" is not running

4. To find and delete NetworkInterface.plist I tried this "under Finder "Go" tab computer/Library/preferences/system configuration" I just get the message "The folder can't be found"

5. Have not tried country change. How and where do you change country.

Trying to delete plist

I get a "No such file or directory" message in finder. Also when I try to do it in Terminal but not sure I am typing the right thing in Terminal. I did..

cd library/preferences/system

I installed Mavericks and now cannot get into software update or apps store. I deleted the .plist file ( two different times because it came back). restarted, I couldn't find a save in preferences network. My region is Spain and I changed it to USA and later back(didn't ask for sign in) but none of this works. I checked my network connections and they show ethernet connected and green dot for both ethernet and wireless.

This saved me a lot of misery, thanks. Apple should probably quit hiring robots, clearly the App Store rep further up the thread had no idea what we're talking about: instructions for signing into the store is just insulting. Much as I love my six year old MBP (this problem was with an iMac) I am pretty much done with Apple. If there is truly a ****, then Steve Jobs is trying to run an eternal stream of iPads through Configurator 2 right now!