AppStore login fails after replacing MoBo

[JBogart]

My old Gigabyte MoBo died on me (GA-Z97X-UDH3).
Replaced it with a Z97S SLI Krait Edition.

Plugged everything in, booted right up! Sound video... everything!

I can log in to iCloud & all my photos & stuff are synced. But if I try to login to the App Store do download/update anything the login fails with the following error:
An unexpected error occurred while logging in.
Your device or computer could not be verified. Contact support for assistance.

Then:
We could not complete your request.
There was an error in the App Store. Please try again later. (null)

I'm trying to update XCode... HELP!!!!

 

[JBogart]

This fixed it:
Thanks kurosagi
https://www.tonymacx86.com/members/kurosagi.106061/
------
Hello,
Hope this can solve the problem.

Open the System Preferences app and go to the Network section. On the left-hand column in the Network section, select each of the items and remove it by clicking the minus sign on the bottom of the column.

Then, go to /Library/Preferences/SystemConfiguration in your main hard drive and delete NetworkInterfaces.plist. Or alternatively, drag it to the desktop (as a backup, in case things go wrong).

By removing all of the Network items in System Preferences and deleting NetworkInterfaces.plist, you have effectively reset the network configuration for Mac OS X. Reboot (you may have to reconfigure your internet connection afterwards).

 

[ezsolt]

This fixed it:
Thanks kurosagi
https://www.tonymacx86.com/members/kurosagi.106061/
------
Hello,
Hope this can solve the problem.

Open the System Preferences app and go to the Network section. On the left-hand column in the Network section, select each of the items and remove it by clicking the minus sign on the bottom of the column.

Then, go to /Library/Preferences/SystemConfiguration in your main hard drive and delete NetworkInterfaces.plist. Or alternatively, drag it to the desktop (as a backup, in case things go wrong).

By removing all of the Network items in System Preferences and deleting NetworkInterfaces.plist, you have effectively reset the network configuration for Mac OS X. Reboot (you may have to reconfigure your internet connection afterwards).

you mean this post?

https://www.tonymacx86.com/threads/...er-yosemite-upgrade.145283/page-2#post-907859