63 votes
Accepted

Is using both wireless/wired charging simultaneously for an iPhone faster?

Your iPhone won't charge wirelessly when connected to USB. If your iPhone is connected to your computer with USB, or if it's connected to a USB power adapter, your iPhone will charge using the USB ...
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58 votes

Can I use 45/60/85W MagSafe era MacBook chargers interchangeably?

There is a lot of misinformation in some answers. I will give some facts along with my reasoning. All MagSafe adapters, when plugged into a mechanically matching receptacle on a MacBook/MacBook Pro, ...
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47 votes
Accepted

iPhone 7 won't charge from my MacBook Pro

Running this in terminal worked for me: (it will ask for your user's password) sudo killall -STOP -c usbd This pauses the troublesome process instead of killing it altogether like other answers ...
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  • 1,991
46 votes

How to disable battery charging?

If you use a small piece of tape to block the middle (signal) pin on your MagSafe charger, your Mac will not charge because it can't identify the charger.
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  • 1,747
45 votes
Accepted

Is this Apple charger cable genuine?

I'm going to go out on a limb here and say that imho, anything claiming to be designed in "Califomia" is not a genuine Apple product :3 Apple's official article -- Identify counterfeit or uncertified ...
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  • 2,435
38 votes

Is the Macbook 12 inch's USB-C charger interchangeable with other USB-C chargers or devices?

This answer is indented to be canonical answer for similar questions and applies to all devices that utilize USB (Type A or C) chargers and conform to the USB Power Delivery specification (version 2.x ...
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  • 82.2k
38 votes
Accepted

How to charge MacBook Pro quickly from an iMac?

This cable costs $39 retail. At this price I am expecting better performance for charging than what I'm getting here. How could I diagnose this issue? There's nothing to diagnose because ...
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  • 82.2k
37 votes

iPhone 7 won't charge from my MacBook Pro

Once I force-quit the process "usbd" this problem went away. Open Activity Monitor -> View -> All Processes -> Search for usbd -> Double click -> Quit -> Force Quit Here are a couple of manual pages ...
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  • 531
28 votes
Accepted

When you charge your MacBook, does it matter which thing you plug in first?

Apple recommends to plug the adapter into the wall before connecting it to the computer. For more information, refer to the Apple Support article, Using and maintaining your Apple MagSafe Adapter. ...
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  • 46.2k
24 votes
Accepted

Can I tell my Mac to charge to 80% only?

Use bclm (Intel MacBook only?). Follow the instructions on github: 1. Download signed and notarized binary from [releases][2]. # Alternatively, you can also get it from homebrew or compile it manually....
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  • 1,867
21 votes
Accepted

How to reset a magsafe charger that doesn't charge macbook pro's battery?

Sounds like you got a sticking ground pin. Just plug it out when connecting to the laptop horizontally (with more force) and stick it back it horizontally as well. Usually this is due to you removing ...
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19 votes

Is this Apple charger cable genuine?

Apple's guide is quite long and a detailed picture of the lightning connector should show the quality regardless of the color or font. That being said, the fonts here show this as a fake. Notice the ...
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  • 191
17 votes

Can I tell my Mac to charge to 80% only?

macOS 10.15.5 on a Mac notebook with Thunderbolt 3 ports has this option (even a bit smarter) embedded, see Optimised battery charging. https://support.apple.com/kb/HT211094
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  • 356
16 votes
Accepted

Can I charge a 2017 MacBook Pro with a third-party USB C power adaptor?

The USB-C plug is not the problem, but the charger is. It is underrated, so it will never manage to completely charge your battery while the Mac is in use, or supply enough when needed. With that said,...
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  • 45.7k
13 votes
Accepted

Can I (or should I) use a MacBook charger on my iPhone?

Unless there is some reason to the contrary that I'm not aware of, yes, you can use your MacBook charger with your iPhone. The power adapter will only convert as much power as is drawn, and the iPhone ...
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  • 14.6k
13 votes
Accepted

"Battery not charging" on MacBook Pro

I found the answer to my charging problem in another question: https://apple.stackexchange.com/a/301722/41731 Please make sure to upvote the answer I linked. Short version: yank the cord forcefully ...
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13 votes
Accepted

iPad or iPhone doesn't charge until unlocked?

What you are observing is due to a security related change made in iOS 11.4.1. Using USB accessories with iOS 11.4.1 and later Starting with iOS 11.4.1, if you use USB accessories with your iPhone,...
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  • 46.2k
13 votes
Accepted

Power a MacBook Off-Grid

I've worked as far afield as Northern Nigeria as a technologist (Infrastructure & Network Engineering), where reliable power is always an issue. Indeed, reliable energy is a problem endemic to ...
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  • 1,501
12 votes

Only one USB-C port will charge my MacBook Pro?

So, to summarize, the port works for all functions (USB connectivity, display, etc) including charging downstream devices (like a smartphone), but you cannot charge the MacBook. Your SMC chip needs ...
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  • 82.2k
12 votes

Is this Apple charger cable genuine?

I'd guess genuine: No Apple logo: none of my (genuine, coming with an iPhone or iPad) cables have the logo. Cardboard holder: Apple do use cardboard holders for those cables, including the one in ...
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  • 415
11 votes

MacBook Pro: Battery icon shows as charging even when not connected to power source

Welcome to AskDifferent! Try to perform a SMC reset, and possibly also a NVRAM reset. From https://support.apple.com/en-us/HT201295: The SMC is responsible for these and other low-level functions ...
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  • 7,184
11 votes
Accepted

How to know Magic Mouse 2 is charging properly?

Unlike the first generation Magic Mouse, there is no indicator present on the Magic Mouse 2 that would indicate the charging status. But if you have access to a Mac (which is with which you are most ...
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  • 46.2k
10 votes
Accepted

Can one MacBook charge another over USB-C?

Yes you can. I finally figured out how. Use a dongle and hook them up like this: power supply > usb-c cable > mbp > usb-c cable > usb-c multi-port dongle > mbp2 I've tested it with ...
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10 votes
Accepted

What are the consequences of using a low-wattage USB-C power supply with a MacBook Pro?

Apple partnered with LG to create a 4K monitor that outputs 60W via USB-C. Apple has mentioned full compatibility with a 13" MacBook Pro (comes with 61W power adapter) but mentioned that with a 15" ...
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  • 116
10 votes

Is this Apple charger cable genuine?

Fake. Aside from the other things people have noted (rn/m substitution, wrong serial number format, shoddy paperwork, etc), the font on the cable is a dead giveaway. Apple's standard corporate font ...
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  • 201
10 votes
Accepted

"Battery is not charging" after updating to MacOS Big Sur

UPDATE: This looks like a new feature of MacOS Big Sur. In the Battery settings, there is a new option called "Optimised battery charging" which stops battery charging after 80% to reducing ...
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  • 2,626
10 votes

Will using higher wattage chargers degrade iPhone battery more quickly?

No. The power rating of a charger has no bearing on the life of the battery nor the consumption of power by the device. A higher wattage charger only means it can supply up to the specified amount of ...
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  • 82.2k
9 votes
Accepted

What happens if I plug a 2016 MacBook Pro into itself?

The new MacBook Pros have circuitry in all USB-C ports so that the charger can be plugged into any port. Plugging a two-way USB-C cable will just make the device think that it's charging as ...
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  • 439
9 votes
Accepted

Safe to charge macbook with USB Type A to USB Type C cable?

Yes, and it is safe. I did charge my 15" MBP from various sources - power banks and adapters (USB Port of a Tesla Model S was my favorite), and it can take around 13W. Just make sure that your adapter ...
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  • 6,222
9 votes

MacBook Pro battery drains when connected to AC power

There are two things that can be attributed to this: There is a technical issue with your charger The Battery Health Management feature (released in Catalina) can make it appear you have a charging ...
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  • 82.2k

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