If your MagSafe cable or power adapter isn't working

Make sure you've connected your power adapter to a working plug socket. Unplug your power adapter from the plug socket, then plug in a known-good device, such as a lamp or clock, to confirm it turns on correctly. If the plug socket is working, connect your power adapter to it and try charging your Mac. If your Mac still isn't charging, shut it down and close the display for 30 seconds, then open the display and try charging it again. If you have an Intel-based Mac, reset the SMC.

Make sure the correct wattage power adapter for your laptop is being used. For the best charging experience, you should use the power adapter and cable included with your Mac laptop.

Unplug the power adapter from the wall, wait for 60 seconds, then plug the adapter back in.

• If the adapter works after this 60-second "rest", it's most likely you have a line noise issue with your power source. You should reset the adapter periodically by repeating this moment of rest. This issue occurs when the AC adapter's over-voltage protection feature senses ground noise and then turns off the adapter.
• Some possible sources of line noise include lights with ballasts, refrigerators or mini-refrigerators that are on the same electrical circuit as your computer. This behaviour may not occur if you plug the power adapter into an uninterruptible power supply (UPS) or plug it into a different circuit.

If your power adapter continues to turn itself off when connected to a known-good socket, take your adapter to an Apple Authorised Service Provider or Apple Store for further evaluation.

Sometimes when you plug the power adapter into a plug socket, you may see a spark. This is usually normal and can occur when you plug any electrical appliance into a live socket. If the spark comes from somewhere other than the blades of the plug, if you experience any damage or discolouration of the adapter, or if you have other concerns about sparking, contact Apple.

Your power adapter comes with a removable AC plug that has the blades for inserting into a plug socket. If your Mac laptop won't charge when using the AC plug with the power adapter, try it with another Apple AC plug, or try using an Apple Power Adapter Extension Cable (sold separately).

If your power adapter works after changing the AC plug or AC cord, the AC plug or AC cord that you were originally using should be replaced and no longer used.

Make sure the power port (where you plug in the MagSafe connector) is clean and free of debris. The port is magnetic and may attract metal objects.

If the indicator light flashes

If your DC cable (the thin cord that attaches the MagSafe 2 or MagSafe connector to the power adapter) separates at either end of the cable, stop using the cable immediately and get your cable and power supply evaluated.