USB external SuperDrive I'm working off an older system, 10.5.8 and want to upgrade,but it won't let me without getting the 10.6.3 disc upgrade,now the problem with that is the internal cd drive won't work anymore and has a disc jammed in it,so I purchased the external USB SuperDrive, when I plugged it in the computer didn't recognise it, this Is really frustrating because I paid $100 for it and at the moment we can't access iTunes or even upgrade that for our iPhones or iPads,is there a way I can get the computer to recognise the USB drive? So I can do the upgrade.
The USB Super drive is compatible with:

the following computers:

MacBook Pro with Retina display
MacBook Air
iMac (late 2012) and later
Mac mini (late 2009) and later
Mac Pro (late 2013)