Start with the cable and power adapter
A Mac that won't charge almost always comes down to the cable, the power adapter, or the port itself — not the battery. Before you assume something is broken inside, check these three things in order.
First, look at the cable where it connects to the adapter and where it connects to your Mac. Bend it gently near both ends. If you see white or copper showing through, the cable is damaged and needs to be replaced. Apple charges between $19 and $39 for replacement cables depending on your Mac model, and third-party cables certified for your specific Mac work too.
Second, make sure the adapter is actually plugged into power. This sounds obvious, but check that the outlet works by plugging in something else — a lamp, a phone charger, anything. If the outlet is dead, try a different one. If the outlet works but your Mac still won't charge, unplug the adapter from the wall for 30 seconds, then plug it back in. This resets the adapter and fixes the problem in about one out of five cases.
Key Takeaways
- Check the charging cable for visible damage first, since a frayed or bent cable is the most common reason a Mac stops charging.
- Make sure the power outlet itself works by testing it with another device, and reset the adapter by unplugging it for 30 seconds.
- Look inside the charging port on your Mac for lint, dust, or debris, and clean it gently with a dry cotton swab if you see anything.
- If the charging port looks clean and the cable is intact, the issue is likely inside the Mac and you should contact Apple Support or visit an Apple Store.
Clean the charging port on your Mac
Dust and lint build up inside the charging port over time, especially if your Mac sits on a desk near a fan or in a dusty room. This buildup can prevent the connector from making good contact with the port.
Look directly into the charging port on the side or back of your Mac with a flashlight. If you see dust, lint, or debris inside, turn off your Mac completely and let it sit for five minutes. Then use a dry cotton swab to gently clean inside the port. Do not use water, compressed air, or metal objects — water can damage the electronics inside, compressed air can push debris deeper, and metal can short the port.
After cleaning, wait another five minutes before plugging in the charger. If the port was clogged, your Mac should start charging now.
Check what your Mac is telling you
When you plug in the charger, look at the light on the connector itself. On older Macs, a green light means the battery is fully charged and the Mac is running on power. An orange or amber light means the battery is charging. On newer Macs with USB-C charging, the light behavior is the same but the connector looks different.
If there is no light at all on the connector, the cable or adapter is not making contact with the port. Unplug it, wait 10 seconds, and plug it back in, making sure it clicks or seats fully. If you still see no light after trying this three times, the cable or adapter is likely faulty.
If the light is on but your Mac's battery percentage is not going up, check the System Settings. On newer Macs, go to System Settings > General > About and look at the battery health. On older Macs, hold Option and click the battery icon in the menu bar. If the battery shows "Service Recommended" or "Replace Now", the battery itself may be failing, though this is rare in Macs less than five years old.
Try a different power outlet and cable
Before you assume the Mac itself is broken, test with equipment you know works. If you have access to another Mac charger that fits your model, borrow it and try charging. If your Mac charges with the borrowed cable and adapter, your original cable or adapter is the problem.
If you do not have another charger to test with, try plugging your current charger into a different outlet in a different room. Outlets can fail, and a failed outlet looks the same as a failed charger from the user's perspective. If your Mac charges in the new outlet, the original outlet is the problem — call an electrician or stop using that outlet.
If your Mac still will not charge with a different outlet and you cannot test with a different charger, the issue is likely inside your Mac.
When the problem is inside your Mac
If the cable is intact, the port is clean, the outlet works, and you have tried resetting the adapter, the charging circuit inside your Mac may be damaged. This can happen after a spill, a drop, or simply from age — the charging circuit is one of the parts most likely to fail in an older Mac.
At this point, contact Apple Support or visit an Apple Store. Bring your Mac and the charger. Apple can run a diagnostic test that tells you whether the problem is the charging circuit, the battery, or something else. Repair costs vary widely depending on your Mac model and what is broken, but a battery replacement is usually $129 to $199, while a charging circuit repair is more expensive.
If your Mac is still under warranty or covered by AppleCare+, the repair may be free or discounted. If you bought your Mac more than a year ago and did not purchase AppleCare+, you will pay out of pocket.
Prevent charging problems in the future
Keep the charging port clean by wiping it with a dry cloth once a month, especially if your Mac sits near a fan or in a dusty space. Do not wrap the cable tightly around the adapter when you store it — coil it loosely or use a cable organizer. Tight wrapping stresses the cable where it meets the connector and causes the internal wires to break.
Keep your Mac away from heat, moisture, and direct sunlight. Heat degrades the battery and the charging circuit over time. If you spill liquid on your Mac, turn it off immediately and do not try to charge it — let it dry completely for at least 48 hours before plugging in the charger.
If you use your Mac on battery power most of the time, the battery will last longer than if you leave it plugged in constantly. Batteries degrade faster when they are always at 100 percent. If you work at a desk all day, unplug the charger once the battery reaches full, then plug it back in when the battery drops to 20 percent.
Frequently Asked Questions
Why does my Mac charge sometimes but not other times?
This usually means the cable is partially damaged or the port is partially clogged. The connection works at certain angles but not others. Try cleaning the port first. If that does not fix it, the cable is likely failing and should be replaced.
Is it safe to use a third-party charger instead of the Apple charger?
Only if it is certified for your specific Mac model. Look for "USB-C Power Delivery" certification on the box if you have a newer Mac, or "MagSafe" certification if you have an older model. Uncertified chargers can damage the battery or the charging circuit. When in doubt, use the original Apple charger.
Can I charge my Mac with a phone charger or iPad charger?
Only if it is rated for the correct wattage and has the right connector. Most phone chargers do not provide enough power to charge a Mac while it is in use. Check your Mac's power requirements in System Settings > General > About, then look at the charger's wattage. If the charger is lower wattage, it will charge very slowly or not at all.
What does "Service Recommended" mean when I check my battery health?
It means the battery has degraded to about 80 percent of its original capacity. Your Mac will still work, but the battery will not hold a charge as long as it used to. You can continue using it or have Apple replace the battery. "Replace Now" means the battery is below 80 percent and should be replaced soon.
How long does it take to charge a Mac from zero to full?
It depends on the charger wattage and whether you are using the Mac while it charges. With the correct charger and the Mac turned off or in sleep mode, most Macs charge from zero to full in two to four hours. If you are using the Mac while it charges, it will take longer or may not charge at all if the charger is not powerful enough.