Identify your MagSafe adapter
Your MagSafe power adapter has either a T style or L style MagSafe connector, or a MagSafe 2 connector. Identify your adapter from the examples below first. If you have a newer Mac computer that uses a USB-C power adapter, learn what to do if your USB-C power adapter isn't charging your Mac notebook.
MagSafe 2 connector
L style MagSafe connectors
T style MagSafe connector
If your Mac uses MagSafe 2, you can charge your Mac with a MagSafe 2 power adapter or a MagSafe power adapter connected with the MagSafe to MagSafe 2 adapter.
If your Mac uses MagSafe, you can charge your Mac with a T style or L style MagSafe power adapter.
The MagSafe connector and MagSafe port on your Mac notebook contain a magnet that can possibly erase data on a credit card or other magnetic devices. Keep magnetic media away from the end of the MagSafe adapter and away from the MagSafe port.
Learn how to check your power outlet and confirm your adapter wattage.
Check the power outlet
Make sure that the power outlet you're using is working correctly. Plug in a known good appliance, such as a lamp, TV, or clock, and confirm it powers on properly.
Confirm the adapter wattage
Make sure the proper wattage power adapter for your notebook computer is used. You can use a higher wattage power adapter, but you can't use one with less wattage without potential operating issues.
Check for line noise issues
Unplug the power adapter from the wall, wait 60 seconds, then plug the adapter back in.
- If the adapter works after this 60-second "rest", you most likely 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 behavior may not occur if you plug the power adapter into an uninterruptible power supply (UPS) or plug it into a different circuit.
- Unless the adapter continues this behavior on a known good outlet, it does not need to be replaced.
Check the plug, MagSafe connector, and cables
Learn how to test the plug and cables and check them for damage.
Test the AC plug or AC cord
If you're using the AC plug (also known as a "duck head") with the power adapter, swap it out for the included two- or three-prong AC cord, or if you are using the two- or three-prong AC cord swap it out with the AC plug. Either connector can be easily connected to the adapter as shown below.
If the adapter now charges the computer, the AC plug or AC cord that was originally in use should be replaced and no longer used.
If you notice any of the following, stop using and replace the AC plug or three prong cable:
- The AC blades are bent (don’t attempt to straighten a bent blade).
- The AC blades don’t lock into place (AC plug only).
- The blades wobble side to side when in locked position on the AC plug or they seem loose on the three-prong cable.
- The AC blades have black marks or other visible damage.
- There is visible wear or a break of the insulation on the three-prong cable.
- Popping sounds from within the AC plug or anywhere on the three-prong cable.
Check for strain relief or stuck pins
If your DC cable (the thin cord that attaches the MagSafe connector to the power adapter) separates at either end of the cable, or you observe stuck pins on the MagSafe connector, immediately stop using the cable and get your cable and power supply evaluated.
MagSafe 2 pins
Check the power port
Make sure the power port (where you plug in the MagSafe connector) is clean and free of debris. The port is magnetic and might attract metal objects.
Check for updates
In some cases, software or firmware updates might be available for your computer that improve communication with your power adapter. If your MacBook, MacBook Air, or MacBook Pro isn't charging as expected, check for software updates on your Mac.
If the adapter gets warm
The power adapter can become warm during normal use, so be sure to use it in a well ventilated area. Always plug the power adapter directly into a power outlet using the AC plug, or place it on a table or other well ventilated area.
Avoid placing your adapter in a poorly ventilated area, like on a couch, thick carpeting, bedding, or a pillow. Avoid covering the adapter with a blanket or other insulation.
The power adapter might turn itself off if it gets too warm. If this happens, disconnect the MagSafe connector from your Mac notebook, then let the power adapter cool down before handling it.
If you see a spark
Sometimes when you plug the power adapter into the wall, you may see a spark. This is usually normal and can occur when you plug any electrical appliance into a live outlet. If the spark comes from somewhere other than the blades of the plug, if you experience any damage or discoloration of the adapter, or if you have other concerns about sparking, contact Apple.
Get your power adapter evaluated
If your power adapter still isn’t working, you can bring it and your Mac notebook to an Apple Authorized Service Provider or Apple Store for evaluation.