MacBook – How to change charger LED color on MacBook Air

In my case, the problem was the temperature of the charger. Since it's currently winter in the southern hemisphere, removing the MacBook from charge causes the charger to cool down (since it apparently draws very little mains power when there is no load on the MacBook side). At some point when it is cool enough, it will refuse to supply power when the MacBook is plugged in again.

The workaround is to warm up the charger (for example, by sitting on it) for a few minutes until the charge light comes on. Then the current running through the charger is enough to keep it warm, and it continues charging.

Update: A year later, after returning from being away for six weeks, my charger refused to work again even after sitting on it. Apple was happy to replace it under AppleCare.

Because you explain the problem perfectly, and in short:

• The battery does not charge, and your Macbook does only work with MagSafe attached

There's only one option what could be the problem...

The battery is dead, let me explain you why:

1. Your battery is ignored somehow, and your Macbook uses power directly from the MagSafe adapter. If you couldn't even use the Macbook with the cable in it, the cable could be the problem. Since it works with cable-attached, it's not.
2. You can use the macbook with cable in it as explained above.