Hello, I want to use a headphone set with a mic attached for my mac or PC. I found out that I would need a splitter for the microphone for it to work for my PC, and my Mac only pics up input form the microphone in skype or vent (only picks up built-in mic for garage band). Anyways so i bought this product off ebay: http://www.ebay.com/itm/200681506125?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649 For the splitter, but it still doesn't work. I plug the splitter into my audio input port, then plug my headphones into one of its ends (has 2 ports). On my PC, both my apple headphones and the ones bought from ebay show up as microphones and everything, except they don't pick up sound (and I checked settings, everything is on and such). On my Macbook, neither show up a microphones. Can someone help? I'm pretty sure the splitter isnt broken or anything, like I said for my PC it shows a microphone on my audio devices, but does not pick up any sound.