microphone not working
I have a regular 2 jack headphone . But the problem is whatever headphone i try there is not input signal from the mic but output is working absolutely fine on any headphone with mic. Some people suggest me to buy usb head phone but my question is if i have to buy usb headphone why mac have given input jack for mic and i tried calling tech support to mac they gave me direction for this website .
so i need help on this.
Mac OS X (10.7.2)