I frequently receive this prompt: "USB Accessories Disabled
Unplug the accessory using too much power to Re-enable USB Devices."
I have a USB Hub with multiple ports. How can I know WHICH USB device is drawing too much power?
This is an annoying & confusing prompt.
Earlier Mac models
Seems to me the message is pretty clear.
When you have multiple USB devices connected to your Mac the problem is the total power draw from all the USB devices. Unplug one USB device at a time to see when the error message goes away. That will at least show you what you CAN have connected without drawing too much power from the USB bus.
Bus powered HDDs and CD/DVD drives typically draw much more power than other USB devices like flash drives or SSDs. And USB devices that have their own power supplies do not draw power from the USB bus.
Seems to me the message is pretty clear.
When you have multiple USB devices connected to your Mac the problem is the total power draw from all the USB devices. Unplug one USB device at a time to see when the error message goes away. That will at least show you what you CAN have connected without drawing too much power from the USB bus.
Bus powered HDDs and CD/DVD drives typically draw much more power than other USB devices like flash drives or SSDs. And USB devices that have their own power supplies do not draw power from the USB bus.
It may also be possible to use the USB section of System {Report / Information} to see what amounts of current are available, and what amounts of current various devices are trying to draw.
Thank you.
(And I like your Avatar name. I too was one for many years)
USB Accessories Disabled
