Recently I bought Macbook Pro Retina Early 2015, and after approximately one month my wifi shows
No Wifi/Wireless device found
I rush to the iStore and submitted my macbook, they serviced it and returned it to me, after approximately 2 to 3 days the problem was back again and gone after 2 days. Since my wifi is working perfectly.
The problem I am facing is now when I open APP STORE and sign in there I get the following error message:
Your device or computer could not be verified. Contact support for assistance.
I googled it search it on forums and got that its an issue of non registered network adapter. Kindly help me in this scenario is this a software bug or a hardware one or some effective solution.