USB Mouse Draining Too Much Power

I have a 22" Cinema Display and I keep my USB Power Mac Mouse attached to the USB port in the back, but now both ports give the error message that the "USB Device" requires too much power. I can plug it into the keyboard and it works fine, does anyone know what is going on?
Brad

Bummer. Oh well, it's lasted 41/2 years, and the Display is still looking good. Thanks for the info, I figured it was that but I wanted to be sure. It's strange both USB ports went out at once. Thanks again.

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I have a corroded usb and maybe thunderbold port (right next to each other) on my MBA. Got a message that my usb device was draining too much power when nothing was in it. The computer is hot around the ports, and it's running through battery power like crazy, even when asleep. Any ideas for a quick fix?

Bummer. Oh well, it's lasted 41/2 years, and the Display is still looking good. Thanks for the info, I figured it was that but I wanted to be sure. It's strange both USB ports went out at once. Thanks again.

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USB port drawing too much power. The device that is plugged into it will be

I get this strange message every so often, sometimes more often than other times. It says:
USB port drawing too much power. The device that is plugged into it will be deactivated.
There are only two things plugged into the USB-The keyboard and mouse. When I get this message, the mouse freezes. If I jiggle the mouse cable where it is plugged into the USB, it comes back and everything is fine until this message comes up again.
Ever seen this before? What did you do?
Thanks for your help.

Ahh I guess I could have figured that out by reading your hardware tag huh...
So it's giving you the message when booting up from a cold system with NO devices attached? (Not even the keyboard and mouse?).
How long before you get this message?
After you get this message, if you plug the mouse in to either USB port (As each port is a seperate bus), to clear the alert, and go into About this Mac, and More info, if you expand the USB info for each bus. Is there anything there that appears to be out the ordinary? (IE Only showing one bus, Showing a device plugged into a bus that isn't plugged in?)

FOR GURUS: Over Current Notice - USB device drawing too much power

Hi,
When I plug a USB extender cable to any USB port on any Mac tested so far, I get the warning:
"USB Over Current Notice. The USB device is currently drawing too much power. The port it is attached to will be deactivated".
In fact, that freezes the Mac mouse and keyboard until the USB extender cable is unplugged, and renders the used USB port unusable until the next restart.
What is going on? Such extender cable worked fine until Virtual PC was open with Windows XP XP2 in safe mode on an iMac G5 (20-inch) with Mac OS X 10.4.3. A 1GB flash pen was inserted, and its files were seen via "My computer". Then the flash pen was taken out (without properly ejecting it via Windows) and someone inserted a 2.2 GB USB hard disk, which froze the Mac and caused the reported problem from that moment.
So it seems that the USB cable is now somehow defective, but I wonder if it could be fixed, since it does not seem to have any internal circuit but just the USB connectors and cables. So I wonder what is going on...
Thanks.

¡Hola, Gabriel!
USB Overcurrent Protection issues arise when one or more of the USB devices draw too much power or, by adding a device to a USB hub, one exceeds the current budget for the entire chain. A detailed explanation can be found in this article, where it states:"Should the cumulative current drawn by a group of downstream ports exceed a preset value, the overcurrent protector removes power from all downstream ports. Overcurrent circuits are used to protect against catastrophic device failures, software errors that lead to devices turning on when the current budget has been exceeded, and user-caused events such as the shorting out of connector pins."See also "USB: Hub Description" for important information on self-powered vs. bus-powered UBS hubs.
Your Apple Pro keyboard is a bus-powered USB hub. Some displays continaing USB ports may act as either bus-powered or self-powered hubs: one has to consult the display's documentation for details.
• If USB Overcurrent problems arise using a bus-powered, third-party USB hub, try a self-powered hub or connect the USB device directly to one of the built-in USB ports on the computer itself.
• If USB Overcurrent Protection issues arise when a device is connected directly to one of the built-in USB ports on the computer itself, then the peripheral device or its cable is either damaged or defective.
Note that you can not put two bus-powered hubs in series. In addition to the article "USB: Hub Description", see also "Apple Pro Keyboard: Devices Connected to Hub May Not Work."
Good luck!
Dr. Smoke
Author: Troubleshooting Mac® OS X

USB device drawing too much power error message

When I try to plug my iPod into my computer to charge or update my music, I get an error message that says, " Because a USB device was drawing too much power from your computer, one or more of your USB devices have been disabled." I've tried this while my computer was plugged in and not plugged in and it still gives me the same message. My computer is completely new, I've only had it about 2 weeks, my iPod is about 3 years old, but the actual iPod works great. It's just the USB cord that is giving me a problem. What is wrong and how can I fix it?

My only option is to click "ok." It has already ejected the USB connection, so I don't really have any other choice. Here is the complete text of the message:
"Because a USB device was drawing too much power from your computer, one or more of your USB devices have been disabled
To prevent damaging your computer, the USB device drawing too much power has been disabled. Other devices may have also been disabled. When you disconnect the device drawing too much power, your other USB devices will be enabled again."

I got lightning to usb camera adapter but get fault message on ipad mine "cannot use device" the connected usb device requires too much power

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HT4101 What does it mean when it says that the USB device requires too much power?

What does it mean when it says that the USB device requires too much power, when using the ipad lightening pin camera connection kit?

Just that. The iPad allocates a certain amount of power to that port. If the device you're trying to plug in wants more than the iPad is willing to give, it'll trigger that warning.
If it's something that you just must hook up you can try using a powered USB hub, but results are mixed at best.
What are you trying to hook to your iPad?

Apple USB keyboard drawing too much power

I had my apple slim keyboard for more than a year and it always worked perfectly.
Last week I started receiving this error message at the login screen:
"Because a USB device was drawing too much power from your computer, one or more of your USB devices have been disabled."
Changing the USB port used to solve the problem. Since this Sunday I can't get the keyboard to work on any USB port.
No other devices are using the keyboard as an HUB and the iMac has all the latest updates installed.
I tried on a Macbook and got the same result, while if connected to an HP laptop it works.
I already tried:
- changing USB ports on the rear of the iMac
- attaching it on an externally powered USB HUB
- resetting PRAM
- resetting SMC
- cleaning the contacts of the USB cable and the ports on the keyboardù
- attaching usb devices to the ports on the keyboard will give them power, but those are not recognized by the system
Any clues? I ran out of ideas...
thanks

It's related to the current drawn through the USB port itself which us monitored by the SMC and interpreted by the OS. Without getting too technical, Macs are better "tuned" to detect these issues. It sounds like your keyboard is dead or dying as it is drawing more than it's allocated current threshold. Solution, replace the keyboard. Some possible causes over time include, sweaty hands, humidity, coffee - it's the sugar over time that does the damage.

How to fix: "One or more of your USB device drawing too much power..."

Plugged my iPhone to do my usual download of photos off my phone into my iPhoto library so that I can edit them and post on eBay and Etsy. Suddenly, I'm getting the error message:
"Because a USB device was drawing too much power from your computer, one or more of your USB devices have been disabled."
I'm surmising that it's because my USB cord (connected from my iPhone to MacBook Pro) might be damaged. It's not charging correctly. Keeps going on and off when plugged into wall or computer.
So, will buying a new cord this solve the issue? I have to get one anyway so I guess I'll find out!
Meanwhile, for tonight I'll have to do just email the photos to myself. Ugh.

It should fix it. I would unplug all of your other USB devices from the computer and see if it continues with that error. If so, then certainly replace that cord (do it anyway since its having issues even in the wall)

USB device drawing too much power...

I have a Mac Pro 1,1 that until this last software update (10.6.7) was running fine. After the download and reboot, my computer is now riddled with the same error message: "Because a USB device was drawing too much power from your computer, one or more of your USB devices have been disabled."
To give further understanding of my set up, I am running an ATI Radeon 5770 video card with three monitors attached: on the DVI port is a 32" Samsung flat panel TV, and attached to the two mini DVI ports were two 20" Apple Cinema Displays connected via dual link DVI connectors (each of which was connected to two of the three USB ports on the hub in the back of the Mac Pro tower).
So, after the software updated and the computer rebooted, the Apple Cinema Displays did not come back on (obvisously because the USB hub in the back of the tower was shut down).
I have tried repairing permissions. I have reset the PRAM and I have reset the SMC. None of these have thus far worked.
After a visit to Apple, the Genius told me that it was because there was some discrepancy with the other third pary PCIe cards that have in slots one, two and three. So I confirmed with him that if I pull the cards and reboot, the error message should go away. I pulled all third party cards from the slots and I'm still experiencing the same problem.
I realize that this sounds like a logic board replacement. But I'm hoping there's someone else out there in the community who may have had a similar problem and may be able to offer any other kinds of work around.
Just for the record, I am running an RME HDSPe card in slot 1, UAD 1 in slot 2 and UAD 2 in slot three. Slots four and five are occupied by the ATI Radeon 5770.
Any advice would be appreciated.
Thank you.

If you don't have any USB devices plugged in, then your Mac may just be confused. Try an SMC Reset:
HT3964- Intel-based Macs: Resetting the System Management Controller (SMC)

USB Mouse Draining Too Much Power

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