Chosen Solution
My MacBook screen goes Dark when I connect to wifi.when wifi if off it works fine.when it connects to wifi than its screen goes to Dark.
The inför on your machine you gave is incorrect. I think you transposed your numbers You probably have system 10.9.5 Pre-Installed MacOS: X 10.9 (13A2093) Maximum MacOS: Current If they did not list the problem when they sold you the machine, I agree with Cam, return it. If you don’t mind please tell us how much you paid for it.
