IMac i7 External Microphones not working

Out of the box, no external microphone will work!
I have tried many.
It seems the system does not even notice that something is plugged in to that port.
Is anybody else having this issue?
Could this be a factory hardware defect?
Tried Soundflower and many other things / settings. No Luck.
Normally I would not care, but I need Skype every day. The internal Mic works, but that is not good enough.

Hi DaBigness
The iMac's Audio Input is for Line- Level or amplified devices like (Stereo receivers, CD & DVD players, iPods, MP3 players, etc.) See > [Line- Level|http://en.wikipedia.org/wiki/Line-level]
To connect a non-amplified microphone you will need to patch it thru an amplified stereo device such as a stereo receiver, a pre-amp, a tape player, an MXL iBoost or a Griffin iMic just to mention a few options. For example's see the > [MXL iBoost|http://pro-audio.musiciansfriend.com/product/MXL-iBooster-Guitar-and-Mic rophone-Interface?sku=243800] or the > [Griffin iMic|http://www.griffintechnology.com/products/imic>
Dennis

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