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?)

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strange - try the second port.
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Welcome to the discussions,
have a look at this article, http://support.apple.com/kb/TS1286 , "Symptoms...An alert message indicates the USB device cannot operate because it needs more power than is available."
And
If the issue persists and you are using a Mac, try resetting the USB connection by following the steps in http://support.apple.com/kb/HT1317

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Same thing just happened to my Mini, my wife successfully used a SanDisk Micromate adapter to download photos, but when she tried to plug in her iPhone4 the dreaded USB drawing too much power ports will be shutdown msg appeared. I can plug in the phone on my other Mac no problem, so its the Mini's usb ports. Help anyone? SMC reset did not work.

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Hi Guys,
Today I went and bought myself a new Mac Book Pro 13".
Tonight I've been transfering all my files over from my old MacBook and everytime I try to connect my IPhone 3GS by USB to my Mac a message comes up straight away saying "A device conected to your computer is drawing too much power, apple has disconected this device to prevent damage occuring to your computer"
I have tried to connect my phone numerous times while it has been conected to the power cord and also running on battery.
It also took my new Mac a good half an hour to recognise my external hard drive was connected and let me use it..
I have had this problem once or twice with the same IPhone and my old mac so im thinking it may be a problem with my phone considering it is 2 years old now?
But then again, my old mac that is nearly 4 can still connect to my phone when my new MBP can't.
Any help would be appreciated.
Thanks,

Use a self powered USB hub.
https://discussions.apple.com/community/notebooks/macbook_pro?view=documents

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:
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- resetting PRAM
- resetting SMC
- cleaning the contacts of the USB cable and the ports on the keyboardù
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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.

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USB Over Current Notice
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The Mac is plugged in. There is no other USB device attached. The last time I used it (a few weeks ago), it worked fine. I have plugged it into both USB ports and received the same error message. The mic does not have a power source except the USB cable.
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See this, USB and FireWire Quick Assist, for help.
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Hey vluciay!
Here is an article that describes this situation and can help you troubleshoot the issue:
USB: Troubleshooting Error Messages
http://support.apple.com/kb/TA25618
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So i have this macbook pro mid 2009 model. Whenever i boot the computer up, there's this message that comes up. USB ports must be shut off because its using too much power blah blah blah. Theres nothing plugged into them!
Everything works, camera and all that, but the USB ports.
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Is it with the logic board?
or idk what to do!
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Have you tried an SMC reset and PRAM reset?
SMC Reset
Shut down the computer.
Unplug the computer’s power cord and disconnect peripherals.
Press and hold the power button for 5 seconds.
Release the power button.
Attach the computers power cable.
Press the power button to turn on the computer.
Reset PRAM
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P and R.
You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
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Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.
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repairing disk permissions before and after updating.

How to reset USB port after too much power draw message

Hi everyone,
I have the brand new MBA which I use for work and I tried connecting a USB hub yesterday to it. Once I did the computer immediately shut itself off and after doing some HW troubleshooting for a bit, I unplugged, got back running and saw the error message:
I have done all sorts of reading online and just can't get my USB ports to work at all anymore. I've tried plugging in my apple keyboard directly to both ports, and tried memory sticks but no luck.
Beyond that I have tried the steps for resetting the VRAM (or whatever it's called) and tried an SMC reset (though for that one there are several sets of differing keystroke instructions). I have also had the computer "unplugged from power all night (and in sleep mode) but nothing.
Can anyone please help me? I am fairly computer savvy so do want to try quite a bit more before I take it to an apple store as I just don't have time to deal with it.
Thanks

i had the same problem after leaving my macbook pro overnight with the printer cord plugged in. even though i had unplugged the printer, computer still showed the message. suggested reset didn't work. but what did work was:
1) shutting down computer
2) turning printer on and reconnecting to macbook with macbook still off.
3) powering up macbook
4) removing printer USB cable AFTER macbook fully booted up.
voila, no more message, all USB ports functioning!

USB port driving too much power.....error

hi there i m proud owner of this computer:
Model Name: MacBook Pro
Model Identifier: MacBookPro1,2
Processor Name: Intel Core Duo
Processor Speed: 2,16 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 2 MB
Memory: 2 GB
Bus Speed: 667 MHz
Boot ROM Version: MBP12.0061.B03
SMC Version (system): 1.5f10
Serial Number (system): W863607ETJ1
Hardware UUID: 00000000-0000-1000-8000-0016CB98D696
Sudden Motion Sensor:
State: Enabled
I ve upgraded my MBP to SL and since 3/4 days ago i ve been experiencing problems whit the USB port. A nice "error window" pop up saying that one or few USB port is driving too energy and therefor will be shut down. The error continued to pop again many times, sometimes 5 of this windows pops up simultaneously. Yesterday i took a decision (a big step) and reset my mac (after trying other solutions and check ups such as reset the parameter random access memory (PRAM) and nonvolatile RAM (NVRAM) and hardware check ups). Been there done that. I ve decided to install first tiger and no error was shown, then i ve upgraded to leopard and again no error was shown... At last when i ve finally installed SL and reboot the system the first thing that showed up was was that nice error...At least this time it shouws up only at start up... I must conclude that there is a kind of bug in the SL system is there anyone that has an alternative solution to this annoying problem, apart from changing mac ....=D....?

Marco,
Just to let you know you are not alone. I have a similar problem with my MacBook but the message does not seem to affect operation. It occurs when I plug in my USB speakers, but the speakers work just fine and the message does not reappear unless I unplug them and plug them in again. I chatted with a specialist at an Apple store and it was suggested that I make an appointment with a "genius". Because it does not appear to affect operation, I am inclined to wait and see if 10.6.2 changes this behavior.
bd

Because a USB is drawing too much power.....

I am trying to enable my sons ipod 5 as its telling me its disabled and needs connecting to Itunes, however the above message keeps coming up. The ipod is the only thing that is plug in, no other USB devices. I just took out the ipod and put in my iphone to see if the same error occured, it didn't. Could it be a problem with the cord?

You're not connecting the iPod USB cable to the keyboard right?

My external hard drive stopped working so I had a tech fix it by moving it to another case since the power supply is in the case. It was working fine till I started getting these messages saying USB over current device, my USB is drawing too much power.

I need to know how to rehabilitate the hub since it gets deactivated as soon as I plug the external drive. By the way the drive contains important information

Buy a drive or drive case that is not bus powered.
Look for help in MacBook Pro forums.
Helps to include what drive and drive case you used and switched to (you didn't need a tech).
You can find good selection and assortment of reliable cases from OWC :
http://www.macsales.com/firewire
Not knowing what macbook whether you can use USB3, Thunderbolt and other interfaces that would be better.
WD My Book 2TB External Hard Drive Storage USB 3.0 File Backup and Storage - Western Digital
Direct you to the proper forum for MacBook :
MacBook Series Forums
https://discussions.apple.com/community/notebooks?view=discussions
http://www.apple.com/support/macbookpro
Mac OS X Forum
https://discussions.apple.com/community/mac_os?view=discussions
This forum deals with a desktop/tower 65lb Mac Pro
http://www.apple.com/support/macpro

Error message: "USB device drawing too much power"; Battery will no longer hold a charge. Help?

A few months back a jump drive broke while inserted in my Macbook (the computer fell sideways and cracked the jump drive). That particular USB port no longer works and I keep receiving an error message that tells me a USB device is drawing too much power, even though nothing is plugged into either port.
It wasn't a huge issue until my battery stopped holding a charge. The computer is usable while plugged in, but as soon as the cord is disconnected it will immediately shut down. I assume this has something to do with the faulty USB port.
In addition, my CD drive will no longer burn CDs. It will read CDs and allow me to open content from them, but it will no longer burn content to a new disc.
As soon as I am able I am taking the computer to the store to get checked out, but in the meantime I wanted to see if someone has experienced a similar problem and knows what needs to be replaced or repaired, and how much that might be.

I guess I should say, abnormally warm. Does it feel like there's a small heater going in there?
I don't think this is the kind of thing you want to undertake, not if you're asking about how to do it. I don't know much about the insides of Macbooks other than the parts needing replacing are probably soldered to the rest of the computer. It's really something you need an expert to investigate.

Every time i plug the phone into the computer i get a popup saying "the usb plugged in is drawing too much power". how am i going to get the song off that old phone and into my new mac

I recently got both an iphone 5 and a macbook air. im trying to take the songs off my old phone (iphone 4s) and get them onto my mac's itunes and then be able to sync them to my new 5. every time i plug in the 4s into the mac, it says that the USB is drawing too much power and has to be shut off. what should i do to recover my songs?

Are you using a usb hub or anything like that? If so, try without. Otherwise unplug everything from your mac and reboot with your iphone 4s plugged in and nothing else.
Hope it works!
Ryan

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

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