How to keep USB powered while in sleep

I've read about people wanting to turn off USB power while in sleep mode. I would like to know how to turn it on so I can charge USB-powered devices without having the system on. I would prefer it to only work while plugged in to A/C power, but won't mind if it's all the time.
No power option under system settings, only "energy saver" and nothing there controlling USB power.

When the system goes to sleep, the I/O controller turns off all outputs. The system has to be on in order for you to power your USB devices.

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Hey guys!
I recently updated my macbook pro mid 2011 to the new operating system: MAVERICKS
I used to do this little handy thing, where i used my mac as a powerbank for my phone once it was empty. I would insert a micro usb cable in one of the usb ports, and it would be active and thus charge my phone....
It worked before, but in mavericks it's gone!
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I run Mavericks, my USB ports charge my iPad and / or iPhone while asleep. The behaviour has not changed.

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Hi,
I am having a similar problem. I have an iMAC (serial in the range W8435xxxxxx - W8522xxxxxx) and in the two weeks, when the computer is put to sleep it turns off. However, I only notice this in the morning after it has been asleep all night. The problem seems to be far more frequent when I put it to sleep as opposed to just letting it time out and go to sleep that way.
I have applied all updates and the only modification to the computer is extra ram (from Other World Computing).
I have seen elsewhere that I can see the computer's reason for shutdown in "system.log". Can anyone tell me how to find that so I can look for the shutdown code there?
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While reading some detailed articles on the web in Safari,I face a lot of problem.The screen goes dim and then turns off.
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I don't know of any software that detects when you're reading the screen - that's not to say some doesn't exist.
I'm sure there used to be an option to elect whether the screen should dim before sleeping/screen saving, but I can't actually find it. I'm on an iMac, maybe it's laptop specific and I haven't got one any more to check.
At least if it dims first you've got the chance to touch a key/mouse/trackpad to prevent it sleeping.

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Bifocals wrote:
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How can I keep USB's ports active while in sleep mode?

OK, for some of you that may have the same problem or question as me. I have been testing my MAC Book Pro for ways to continue to power the usb while laptop in standby or off. I have found the following thing to work or not work.
1. The laptop doesn't send any power to your USB's when it is powered off reguardless if it is plugged in or not.
2. If laptop is put in standby no power is sent to USB's unless the power cord is plugged in on the laptop. So once again if you plug your laptop in and then put it in standby it does still send power to the USB's when requested.
So the bottom line is, On my last laptop (toshiba) I was given an option to go into system preference and make a change that allowed my laptop to continue to send power to USB's when requested while in standby or powered off. I was hoping I could do the same thing with my new smokin Mac Book Pro but I haven't found that kind of option in the MAC.

USB port powered while sleeping?

Does anyone know if any of the USB ports on an Intel 24" iMac are powered while my Mac is sleeping? So something like my phone will continue to charge while the Mac is asleep?
Thanks!

HI,
*Charging Tips*
"iPhone 3G and iPhone 3GS cannot be charged with a FireWire power adapter or FireWire-based car charger. Make sure your computer is on while charging iPhone via USB. _If iPhone is connected to a computer that’s turned off or is in sleep or standby mode, the iPhone battery may drain."_
From here: http://www.apple.com/batteries/iphone.html
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You can't. And you shouldn't due to heating issues.
There are however 'hacks' that allow you to bypass
this.
http://www.alxsoft.com/mac/sleepless.html
http://semaja2.net/insomniaxinfo/
Blackbook C2D Mac OS X
(10.4.10) 120Gig, 1Gig, Superdrive.
This may be true of overheating, but ONLY in the iBooks and very old laptops, if you think about it what is the difference between native clamshell mode (Using the monitor/keyboard etc) and the hacked clamshell mode? does plugging a screen in to the laptop some how create more ventilation :S
This rumor is really really wrong, and as stated only affected the old machines which were not capable of native clamshell mode, but of course we keep the warnings there because we dont want to be sued if some idiot places it in there laptop bag while rendering a movie.
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T

All three USB ports on my white 20" C2D remain powered during sleep;
I just checked them with the power lamp on a USB-powered audio box.
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Hello,
Will an Apple Iphone 3g charge from a Powered USB Hub while the computer is sleeping?
I have a Motorola SLVR L7, two BCK-08 Bluetooth Stereo Headsets and two iPower Secondary iPhone batteries that all charge from my Powered USB Hub while my main computer is sleeping.
It would seem that my iPhone 3g will not charge from a Powered USB Hub while the computer attached to it is sleeping?
Is there any way to get an Iphone 3g to charge from a PoWeReD UsB HuB while the computer it is attached to is sleeping?
I'm thinking in terms of greening things ... but this is making me leave a 170 Watt computer running while I sleep ... I don't use the computer much while asleep ...
Thanks for your time,
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How 'linux' is OS X?
In linux you can get a lot of USB information by typing "+lsusb -v+"
or through "/proc/bus/usb/devices"
(but they would both list everything connected via USB)
if you knew the vendor and device id you could type as an example
+(laptop:/proc/bus/usb) # lsusb -v -d 050d:805c+
+Bus 001 Device 008: ID 050d:805c Belkin Components+
+Device Descriptor:+
+idVendor 0x050d Belkin Components+
+idProduct 0x805c+
+bcdDevice 0.01+
+iManufacturer 1 Ralink+
+iProduct 2 802.11 n WLAN+
or
/proc/bus/usb/devices
+T: Bus=01 Lev=02 Prnt=03 Port=02 Cnt=01 Dev#= 8 Spd=480 MxCh= 0+
+D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1+
+P: Vendor=050d ProdID=805c Rev= 0.01+
+S: Manufacturer=Ralink+
+S: Product=802.11 n WLAN+
+C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr= 4mA+
In windows under details it lists the parent ID (port above) so if you found the USB port the iPhone was connected to ... you could find the hardware and vendor id or name of the hub it was plugged in to ...
I'm thinking it might be easier and more positive to start a thread requesting that anyone who has an iPhone that will charge from their computer through a USB Hub while that computer is sleeping ... but I don't know if I can start a thread with a title that long ...

How to keep USB powered while in sleep

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