After persuading my friend to get his first mac (an iMac) he set about starting it up. It was all going swimmingly until he tried to install his dongle from the 3 network (UK). It says its mac compatible, and indeed the install goes fine following their own guide (here - http://ask3.three.co.uk/SRVS/CGI-BIN/webisapi.dll/,/?New,Kb=MBB,TS=MBB,varset_USERNAME=MBB:mbbUser) right until the part which that official guide skips - Choose Device. It asks which device to use, it gives 2 options, regardless of which one my friend selects it says it hasn't found the device and wont let him continue. He has tried a different USB port, tried cleaning the sim, tried reinstalling the driver. The light on the dongle is on, presumably saying its switched on The dongle works fine on his windows laptop. I feel bad because he lives too far away for me to have a look, and I dont have enough experience with installing dongles on mac to do it without seeing it. I installed my sisters imac dongle months ago, but cant remember having any issues there. Any advice?