I recently bought a headset, pretty cheap. It comes along with a mic and sound. However to use the mic you must use a Y audio splitter.
I am using a Macbook Pro so it only has one port, so i bought an 3.5mm audio splitter off of eBay. So it goes from a one jack to Y splitter (2 jacks mic + sound) then back to one jack (3.5mm). However my Macbook will not detect the microphone. D: please help