What does 'unplug the accessory using too much power' mean? I received this message when I had only a USB adapter plugged in, plus the Mac's power cable connected to an 87W Apple transformer and a data link to an accessory screen. Can't understand why the power is 'too much' ... What should be my response to the message?
MacBook Air 13", 10.13
Hello Didyouever,
Thanks for reaching out to the Apple Support Communities. I can see from your message you’re receiving an alert about the USB accessories using too much power. Based on the information you’ve provided, the first step will be to reset the System Management Controller (SMC). The SMC works with the power system of your MacBook Air, which the USB-C ports are part of. Follow the steps under, “How to reset the SMC on Mac notebooks,” from this article: How to reset the System Management Controller (SMC) on your Mac .
Let us know the results.
Cheers!
Many thanks, this worked: I can now attach peripherals without getting the message.
Hi Didyouever,
Excellent! Glad to hear that resetting the SMC took care of the issue with the USB-C ports. If you have any questions down the road, we're only a message away.
Have a great day!
USB-C port error message on new MacBook Air
