Inspect every inch of the cable.
Mac magsafe power adapter not charging.
A replacement adapter might not be the same size color shape or wattage as the original adapter that came with your computer.
If you need help using your magsafe adapter see apple portables.
If the 2012 macbook pro is the model without the retina display with the cd dvd drive then the 60w would work on both.
If your macbook pro battery isn t charging the most likely place to check for trouble is in the magsafe charging cable.
Then reconnect the charging plug to the wall outlet then reconnect magsafe to the macbook pro.
Your power adapter won t charge the computer.
If connecting a magsafe adapter to a macbook doesn t light up the power led chances are the socket you are connecting to is not working okay.
The adapter only charges the computer intermittently.
Whatever the cause may be in most cases it s actually the adapter and not the magsafe connector.
It could be frayed broken or burned.
Disconnect the magsafe adapter from the mac and from the power outlet.
The macbook air comes with a 45w magsafe power adapter and the 13 inch macbook from 2006 2009 and t the macbook air comes with a 45w magsafe power adapter and the 13 inch macbook from 2006 2009 and the 13 inch macbook pro use the 60w power adapter.
But it should power and charge your mac like the adapter that originally came with your computer.
Let it sit unplugged from anything for about 5 minutes.
The adapter s white insulation separates from the magnetic end of the magsafe connector.