Hardware :: USB Device Cannot Draw Enough Power To Operate Properly
Jun 3, 2010
This is a problem that's been bugging me now for a while: when I plug in my iPhone or even a measly Usb Flash drive into my Apple Keyboard's USB port, a message appears on my Mac's screen saying: "A USB device can't draw enough power to operate properly. If the device came with a power cord, plug it into an electrical outlet. Otherwise, connect the device to a USB port on your computer." Does anyone know why the Apple Keyboard has a weird indented USB connector?
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Jun 19, 2014
i just recently got a keyboard i had back and plugged it in with a mouse i typically use all the time. when the keyboard was plugged in i got the typical message for "USB device drawing too much power, has been disabled…" i just want to re enable the mouse. it was quite obvious it was the combination of BOTH devices that caused this, but i'd really like to just get the mouse working again. I've Tried Resetting the SMC and ran the diagnostic but nothing has worked.
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Mar 2, 2012
It started recently, and I've had this Mac Pro (10.6) for several years. Sometimes, when I move a window, it doesn't redraw the screen *under* it properly, leaving my screen completely messed up. Activating Dashboard (temporarily) fixes it (causes a correct re-draw of everything), and sometimes taking a screengrab fixes it - the display looks correct underneath the area I am selecting for screengrab. A reboot fixes it also, for a while. Sometimes a Firefox window goes completely black, for some seconds, then comes back; haven't noticed that for any other programs' windows. I have 4 monitors connected to this Mac and a bunch of internal drives, but everything was very stable until recently.
Info:
Intel Mac Pro, Mac OS X (10.6.7)
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Jun 19, 2010
I have found that by plugging in my Apogee Duet firewire audio interface and ONLY WHEN AppleFWAudio was loaded there was a 10c CPU raise that was making my MBP (late 2008) hot!I wanted to monitor the power that was required for Duet to run and to see if the temperature rise was due to that, so:With Apogee drivers uninstalled (just to be sure its not their drivers related, which is notMBP on battery power with System Profiler opened (to monitor the mA required by the computer from System Profiler -> Power)
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Sep 3, 2009
I've got another ongoing thread (2006 Mac Pro Elevated CPU Temps) where I've been attempting to determine why my 2006 Mac Pro was running so much warmer than I recall at time of purchase By sheer luck, I seem to have stumbled on the cause... when I first noticed it, I was running 10.5.7 with the CPUs idling around 130F or so... as noted in that thread, I tried all sorts of things such as cleaning the dust out, reapplying the thermal paste, etc... all of which had no impact... for an unrelated issue, I decided to re-install OS X 10.5 base version and I was shocked to discover my CPU temps back down in the mid-90s F
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Aug 3, 2007
I have an 14" iBook, 1.07 GHz and it won't use battery power. As soon as I unplug it it turns off. It worked fine until I opened it up and swapped in a DVD-RW and a new hard drive (the old one was failing). In the power section of system profiler it shows 98 load cycles and about a 75% remaining capacity. It may or may not be charging - I can't tell. The battery says it's fully charged at 95% and I have no way to drain it and see if it will recharge because the computer won't drink from the battery. I had another 14" iBook battery laying around that I thought worked, but now when I put it in this computer it just sits at 0% then eventually says the battery is dead (the menu icon shows an X through it).
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Dec 30, 2007
I have a total of 10 USB devices connected to my G5 Mac, including hubs, printers and scanners. Most behave fine, but one or two cause minor problems. The worst offender is a Sierra Wireless 875U Aircard, which is a wireless broadband modem I got through AT&T. I use it for my Internet connection.
Every time I power up my Mac or bring it out of sleep, it won't recognize the 875U, even though it's plugged directly into the Mac's front panel USB port. I can't even see it on System Profiler. Having it in a different port or going to a hub port doesn't make any difference.
To make it work, I have to unplug it, wait a few seconds and plug it back in. My Mac then recognizes it and it works fine until I shut down the Mac or put it to sleep again. Granted, this is only a nuisance level problem, but it would be nice if the Mac recognized all the ports all the time. I'm running a duel G5 2.0 GHz under Mac OS 10.4.10. I see the exact same problem in my G4 iBook (1.0 GHz) also running Mac OS 10.4.10.
Information:
Dual G5 / 2GHz
Mac OS X (10.4.10)
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Dec 3, 2007
I hope the following problem is not too long winded. we have 3 identical Dual 1.8Ghz G5 Power Macs all with 30" Apple LCD screens, when any usb storage device is connected powered or unpowered, memory stick or hard drive, any pictures copied over to the mac are corrupt (lines through them, half the picture sheared off to the left or right, half the pic in another colour etc). f i connect the device to one of our older G4 machines or one of our new imac's there is no problem.
Information:
Dual 1.8Ghz G5
Mac OS X (10.4.10)
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Aug 14, 2010
Just recently, I keep receiving an error, every couple of minutes or so, thats states: "A USB device is currently drawing too much power. The hub to which it is attached to will be deactivated." Now I have seen this same problem posted, but I have No Device hooked up at all. I have a 2 year old macbook pro 2.4 GHz, running 10.5 I've tried rebooting but it continues to occur.
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May 18, 2012
I keep receiving this message, over and over, sometimes stacked 6 times or so, but the only issue is that I have nothing plugged into my USB at all. I tried restarting, but it didn't work.
Info:
MacBook Pro, Mac OS X (10.7.4)
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Nov 22, 2007
I have a cd jammed in my optical drive and cannot eject it. I can hear the drive trying to move the cd which was not seated correctly when the drive closed. Any one have a low tech way of getting into the drive to get the cd out?
Information:
G5
Mac OS X (10.4.10)
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Jun 3, 2012
my macbook pro had an error in regards to something like a usb device has used to much power and has now been closed. Since then the mac won't recognise any device i put into the usb port
Info:
MacBook
Pro
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Jul 6, 2012
I'm using iMac with wireless mouse and keyboard.Once,I've unplugged flash memory directly without eject, USB error message shown on the screen,After that,although I've removed all of usb devices&cables on the connector,But USB error message always pop up periodically.I tried SMC reset, But issue still existed?
Info:
iMac, Mac OS X (10.6.8)
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Sep 13, 2006
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.
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Mar 19, 2012
I was looking through the posts on here and the only solution I could find was to reinstall Lion, so I did, but it still doesn't work. Everytime I plug the mic in it says, "USB device requires too much power." I just bought the mic. I tried calling the Blue mic costumer service but no one answers.
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Dec 1, 2014
I have Macbook Pro Early 2011. recently my USB device stops working and I am getting message " The USB device drawing too much power has been disabled"and MacBook Pro getting over heated.
Info:
Mac Pro, OS X Mavericks (10.9)
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Apr 26, 2012
Here's the deal on an old MacBookPro Intel Core Duo 2.16 GHz! The disc can’t be burned, because the device failed to calibrate the laser power level for this media. Basic problem is the dvd burner doesn't burn!Â
Info:
MacBook Pro, Mac OS X (10.6.8)
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Sep 1, 2014
I have a mac book pro OSX 10.7.5 I am getting this message when trying to burn a cd: The disc can’t be burned, because the device failed to calibrate the laser power level for this media.
Info:
Mac Pro, Mac OS X (10.7.5)
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Jun 28, 2009
How do I actually operate Seashore? How do I get a map into seashore and colour it as I'd like it done?
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Jun 11, 2012
I am getting Autocad software, what is the best Mac for this software?
Info:
Mac Pro, autocad
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May 23, 2010
My Macbook pro is not booting properly. When I start it up, it goes through the normal process and gets to a point where a screen comes up telling me: "You need to restart your computer. Hold down the Power button for several seconds or press restart now" This happens every time. I tried to start in safe mode and holding down the option key and selecting the mac partition. Neither would work.
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Dec 27, 2010
I'm kinda curious as to how fast handbrake would operate on a 12 core Mac Pro? (let's say with 16-32GB RAM) Let's say a 24 minute episode at 640x480 2.5mbps off of a DVD, normally takes about 24 minutes on a 13" 2.4 C2D MBP with 8GB RAM. how fast will the 12 core MP process that? if one day I should have $10K to throw around, I want to go buy a top of the line MP just to have one... It costs the same as an International Business class air ticket, but the MP will last several years while the ticket is only good for a 30 hour experience.
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Apr 21, 2012
When I look at Mgsafe 45W Charger for MacBook air description in the Apple Store,
It is written at the end :
"This power adapter recharges the lithium polymer battery while the system is off, on, or in sleep mode. It also powers the system if you choose to operate without a battery. "
Info:Imac 20-Inch Mid 2008, Mac OS X (10.7.3)
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Jun 9, 2012
My parents have trouble operating there new imac. I would like to be able to take over remotely from my imac. Can I do this? Is there a way?
Info:
iMac (21.5-inch Mid 2011)
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Sep 10, 2010
My grandparents broke their 24in Imac's monitor and it needs a replacement, costing around 800+ dollars. I was wondering if it was possible to operate it with a second monitor and have that one be the main computers display. Is it as simple as connecting the second display or do I have to disconnect the internal monitor? I'm not worried of opening up the computer, its not like I can damage the screen edit: The Imac is out of warranty and is a 2007 or 2008 model. 2.4GHZ C2D 4GB Ram. If you need any more info just let me know
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Oct 1, 2009
I remember when I was growing up that computers had screensavers that would draw a picture over time. I was not sure if there was something out there for Snow Leopard that did that now a days. I tried to do a google search on it, but so many things were ads or they cost money or the description I tried to give was giving me the wrong results. If someone has a link to such a screensaver or can tell me where I might find one.
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Mar 19, 2010
I'm trying to find out how to use the application "Grapher", but I find it difficult! It's easy for me to draw the graph by telling the program which equation I want it to draw, but I don't know how to and whether it is possible to draw something manually in the graph, for example the slope.
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Apr 17, 2012
I have a Mac Pro with 4 monitors; I've been using it for a couple of years now, with no problem. Over the last few months, I've noticed that after a while, screen redraws (like after I move a window) get completely messed up. Remarkably, this is visible to screengrab, so you can see what it looks like here: url...it's worst on one of the monitors, but does happen on one of the others.Usually going to Dashboard and back clears it up, but not always.Also, a weird thing affects Firefox - the window contents go completely black sometimes. Sometimes moving it to a different monitor makes it show up again, and sometimes not.I've had one of the video cards replaced (the one running the monitors where this happens most often) but it's still happening. And it's not consistent enough so that if I taker the machine to Apple, they'd have to work on it for weeks maybe to see this behavior. [code]
Info:
Intel Mac Pro, Mac OS X (10.6.7)
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Apr 25, 2012
I will be out of town and will like to know if I can operate my Apple imac (intel) by remotre control?
Info:
AppleTV 2, Mac OS X (10.7)
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Jun 18, 2012
Java won't operate or update. Looked in preferenes and coudln't see that Java was disabled. Tried to use a program with Java required and it said it was either disabled or not updated.
Info:Mac Pro, Mac OS X (10.5.8)
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