mackbook pro apps install

[cajyc]

Hi I bought a new mackbook pro 13 2015 running on seirra ox, but I cannot install apps, it asks me administrator name and password, I HV already made a apple ID and tried using it but doesn't work. Also I HV the password which we use when the mac boots up,. I HV also seen the name of previous owner is still there.

 

[hang-the-9]

Since you bought the system used, contact the prior owner for the administrator password. That system should have been wiped clean like a new system when you got it, it is a really bad idea to sell a computer with the old account on it.