The adapter s white insulation separates from the magnetic end of the magsafe connector.
Mac magsafe power adapter not charging.
Your power adapter won t charge the computer.
If the 2012 macbook pro is the model without the retina display with the cd dvd drive then the 60w would work on both.
A simple way to see if it s the problem is by doing a thorough inspection of the entire cable.
Disconnect the magsafe adapter from the mac and from the power outlet.
Let it sit unplugged from anything for about 5 minutes.
Inspect every inch of the cable.
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.
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.
A replacement adapter might not be the same size color shape or wattage as the original adapter that came with your computer.
The led on the adapter connector doesn t light up when attached to the computer.
If you need help using your magsafe adapter see apple portables.
Maybe the adapter is not getting its power could be a loose socket or an improper connection.
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.