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Charge iPhone While Mac is Sleeping iOS devices
I found a solution to charging my iPhone while my Mac Mini is sleeping overnight. I didn't want to leave my computer on all night just to charge my iPhone, and didn't want to switch between the computer and wall charger every day. Usually, when you put your Mac to sleep, it cuts power to the USB ports, so your iPhone won't charge. To solve this, I ordered the "iPod Dock Connector to Firewire and USB 2.0" from the Apple store. With this cable, you can use the USB end to sync with your computer, and use the Firewire end to charge the phone overnight. Both ends stay connected to their respective ports all the time. This works because the Firewire ports still provide power when your Mac is sleeping, unlike USB. I currently have it plugged into a powered Firewire hub, but I've also tested it with a Apple 23" display and MacBook Pro.

[kirkmc adds: I can't test this, not having an iPhone here in France, but it makes sense that just plugging the phone into a powered hub will charge it; does it charge as well from a powered USB hub? Can anyone confirm?]
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Charge iPhone While Mac is Sleeping
Authored by: DanFrakes on Oct 01, '07 10:23:26AM

Yep, the USB ports on a Mac don't supply power when the Mac is sleeping; however, the FireWire ports do.

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Dan Frakes / Senior Editor, Macworld / Senior Reviews Editor, Playlist



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Charge iPhone While Mac is Sleeping
Authored by: ennisdb on Oct 01, '07 01:53:32PM

Another option would be to have the computer "wake from sleep" for an hour or two (not sure how long charging takes) and then sleep itself again. You can do this vis System Preferences --> Energy Saver --> Schedule...



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Charge iPhone While Mac is Sleeping
Authored by: davidwb45133 on Oct 01, '07 10:36:44AM

Dan - I haven't tested this on Intel Macs but PPC based Macs do NOT supply power to the FireWire ports when the computer is asleep. This became an issue when Apple shipped generation 3 iPods. Gen 1 and 2 iPods used standard FW cables but with the switch to the proprietary port, when the computer went to sleep the iPod power drained - USB or FW port.



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Charge iPhone While Mac is Sleeping
Authored by: Mechcozmo on Oct 01, '07 05:13:13PM

My PowerBook G4 would charge my iPod while asleep. That was a PowerPC computer and a 3G iPod. The caveat, and a fairly obvious one, was that the computer had to be plugged in to provide the power; if you were running on battery power, no iPod charging while asleep. Otherwise, when plugged in, the iPod would charge just fine over FireWire.



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Charge iPhone While Mac is Sleeping
Authored by: network23 on Oct 01, '07 11:36:23AM

I think kirkmc was asking was not a confirmation of the hint issue, but rather could you just plug your USB cable into an external powered USB hub and it would still be charged when the Mac was asleep. If so, your iPhone would still sync and interact with the Mac as if it was plugged in directly, and also charge when asleep without having to buy an additional cable.

I'm at work so I can't test this out right now.

---
Live and Direct, only from
Network 23



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Charge iPhone While Mac is Sleeping
Authored by: smpopke on Oct 01, '07 12:59:27PM

I originally tried plugging the iPhone USB cable into a powered USB hub, and it looks like the hub stops supplying power when the computer it's connected to shuts down or sleeps. Apparently you can modify a USB hub to supply power even when the computer is off or sleeping though.



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Charge iPhone While Mac is Sleeping
Authored by: CajunLuke on Oct 01, '07 01:03:40PM

No - my 5G iPod will not charge when hooked only to a (powered) USB hub.



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Charge iPhone While Mac is Sleeping
Authored by: npaust on Oct 01, '07 02:38:43PM

I can confirm that just using a powered USB hub is not enough to get your iPhone to charge when your computer is asleep. I bought a powered hub to do exactly this with my iMac and was very surprised when it didn't work.



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Charge iPhone While Mac is Sleeping
Authored by: Raitti on Oct 02, '07 12:32:15AM

The Firewire/USB -combo-cable is essential when using any of the bigger iPods or iPhone as mere USB doesn't provide enough power to charge the unit AND transfer songs. If you connect the device to a computer when it's low on battery and immediately start loading it full of songs the unit might shutdown during the process. This shutdown can be "fatal" to the device.

Just so you know.



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Charge iPhone While Mac is Sleeping
Authored by: nuggi25 on Oct 02, '07 06:48:08AM

My 800mhz G4 iBook and my Core Duo Macbook doesn't cut power to the USB ports when the computer is sleeping. Only when fully shut down.
I'm surprised the MacMini does!



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Charge iPhone While Mac is Sleeping
Authored by: Dunkin on Oct 02, '07 10:46:05AM

I recently bought a Targus 7 port USB powered hub that has 2 ports that stay powered regardless of computer condition (On, Sleep, Off) and can be used to charge or run any USB device.

Check the USB hub for this feature. It is exceptional not standard for most USB hubs.

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Please, not again.



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Charge iPhone While Mac is Sleeping
Authored by: jonathanberger on Apr 17, '08 05:50:57PM

The Targus hub with the "always on" ports do not charge an iPhone by itself.

I have an older PowerBook G4 1GHZ that turns off power to the USB ports when sleeping and wanted to charge my iPhone at night, but found out even though the Targus hub has ports that continuously supply power, the iPhone won't charge. Either the power level isn't high enough or the iPhone is expecting something "intelligent" on the opposite end of the dock connector.



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Charge iPhone While Mac is Sleeping
Authored by: rprather12 on Oct 02, '07 06:23:35PM

Now I am very confused, again!

On the surface this seems like a great hint but after watching a thread on the Apple forum about charging your iPhone with an iPod charger I started checking my chargers.

The iPhone charger puts out 5 Volts. Makes sense since that is what is on a USB bus.

But an early iPod Firewire charger I have here puts out 12 Volts. This would seem to indicate to me that the FW port has 12 V on it. If so, then using FW to charge a 5V device wouldn't be a great idea.


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Rick



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Charge iPhone While Mac is Sleeping
Authored by: halberstadt on Oct 02, '07 08:24:02PM

The USB ports on my 2.33 GHz Core 2 Duo MacBook Pro do provide power when sleeping. I charge my Treo 650 every night that way.



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Charge iPhone While Mac is Sleeping
Authored by: wallybear on Oct 03, '07 03:47:32AM

@rprather12:
Firewire ports can supply voltages from 8V up to 30V, it's in their specifications. This is not a problem, as the device that uses the port has a voltagfe regulator on board. The iPod Dock Connector will send the correct voltage to the USB ports.


Recent Macs (at least form PMac G5 and later) supply power to FireWire ports also when turned off (not only when sleeping). It alarmed me when I saw for the first time the firewire external drive still on when Mac was off, but I discovered it is a new (odd) feature.

Many self powered USB hubs supply power also when host computer is off; not all of them, but most.



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Charge iPhone While Mac is Sleeping
Authored by: ptelford on Oct 03, '07 09:21:35PM
Apple clearly states not to plug both ends into a computer at the same time. The Firewire end is supposed to be plugged into an AC power adaptor. http://docs.info.apple.com/article.html?artnum=93339

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Charge iPhone While Mac is Sleeping
Authored by: eduo on Oct 11, '07 02:40:04AM

This article is from 2003, when iPods still used Firewire for Data transfers. It's not valid anymore. Since the firewire port is used only for power in the ipods the computer effectively becomes a charger in that situation.

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Eduo



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Charge iPhone While Mac is Sleeping
Authored by: theinsaneone on Dec 26, '07 06:51:21PM
The article on Apple.com mentioned above was updated this year "Last Modified on: August 28, 2007". As a side not it appears that only the 5G iPods and the nanos cannot be sync'd with Firewire.

http://docs.info.apple.com/article.html?artnum=93405


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