Can't update - asking for Apple ID from previous owner

[Shambles]

Hi all,

I'm trying to update Yosemite through the App Store, but it's asking for me to sign in with the Apple ID of the previous owner (it's a 2nd hand MacBook).

The email address is greyed out and I can't change it. Does anyone know what I can do?

Thanks in advance

 

[Weaselboy]

Just sign out of the App Store then sign in with your own AppleID then go to the Yosemite page and "purchase" (free) it under your AppleID.

 

[Shambles]

There we go, cheers