How many USB

sapper · sapper #1 (**permalink**)

09-03-2011, 01:21 PM

How many USB ports can I connect to an imac?
And anyone have a recommendation?

Cheers, Dave.

louishen · louishen #2 (**permalink**)

09-03-2011, 01:27 PM

to extend the amount of usb devices beyond an iMacs own ports it is best to get a powered USB hub. You can attach further devices using the keyboard ports since they can act as an unpowered hub but you may find that some devices dont get enough power to work, so a small powered hub is best

pigoo3 · pigoo3 #3 (**permalink**)

09-03-2011, 01:30 PM

Quote:

Originally Posted by sapper

How many USB ports can I connect to an imac?
And anyone have a recommendation?

Cheers, Dave.

I believe...as long as you're using powered USB hubs (just like "louishen" mentioned) and those powered USB hubs are providing enough power for all USB devices plugged into the hubs...you can connect up to 127 USB devices to a single computer.

USB - Wikipedia, the free encyclopedia

- Nick

MancmacUK · MancmacUK #4 (**permalink**)

09-03-2011, 01:44 PM

Power the USB hub from it's own PSU.

I had an iMac powered 4 way, and it used to sometimes freeze the iMac after sleep. for some reason.

sapper · sapper #5 (**permalink**)

09-03-2011, 04:40 PM

Thanks guys, very helpful.

Dave.

Kevriano · Kevriano #6 (**permalink**)

09-04-2011, 02:48 AM

Bear in mind that the more you connect, the slower the transfers to each device are, so if you have a powered hub with 4 HD's attached, the transfer speed is reduced to a quarter of full capacity to each.

louishen #2 (permalink)
Member Since: Oct 22, 2007 Location: London Posts: 8,653 Mac Specs: Mac Mini Core i7 2012 \| White 2009 MacBook 2 Ghz \| 733 Mhz G4 Quicksilver	09-03-2011, 01:27 PM to extend the amount of usb devices beyond an iMacs own ports it is best to get a powered USB hub. You can attach further devices using the keyboard ports since they can act as an unpowered hub but you may find that some devices dont get enough power to work, so a small powered hub is best Member of the Month September 2008 & August 2012 \| Found advice useful? – use the rep system
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MancmacUK #4 (permalink)
Member Since: May 05, 2011 Posts: 72	09-03-2011, 01:44 PM Power the USB hub from it's own PSU. I had an iMac powered 4 way, and it used to sometimes freeze the iMac after sleep. for some reason.  iMac 21.5" 2.5 GHz Intel Core i5 OSX 10.8.3 Last edited by MancmacUK; 09-03-2011 at 07:09 PM.
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Kevriano #6 (permalink)
Member Since: Jul 02, 2006 Location: Crawley, England Posts: 4,560 Mac Specs: 20" Intel iMac 2.4 Ghz/3G Ram/320HD, Snow Leopard. PBook G4, 1.5Ghz/1.5 Ram/250 HD, Leopard 10.5.6.	09-04-2011, 02:48 AM Bear in mind that the more you connect, the slower the transfers to each device are, so if you have a powered hub with 4 HD's attached, the transfer speed is reduced to a quarter of full capacity to each. Try my custom Mac Forums Search Engine: Mac Forums Google Search Please use the reputation system if you consider any help given useful (it's the little ✓/✘ on the left <---)
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sapper #1 (permalink)
Member Since: Dec 16, 2009 Posts: 17	09-03-2011, 01:21 PM How many USB ports can I connect to an imac? And anyone have a recommendation? Cheers, Dave.
	QUOTE Thanks

sapper #5 (permalink)
Member Since: Dec 16, 2009 Posts: 17	09-03-2011, 04:40 PM Thanks guys, very helpful. Dave.
	QUOTE Thanks

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