Record a mix using audacity/traktor?

Hi, really in need of some help pretty please!! Trying to record my mixes so i could listen to them later on for better analysis. I'm using a behringer djx700 mixer and pioneer 200 djs - have connected the rca to the booth output on the mixer and to the laptop microphone port but my mac doesn't seem to pick up the input device and only shows the built in option which is internal microphone Please see the pic that shows connections from mixer

 

Have you read this?

https://support.native-instruments....9-Recording-in-Internal-Mixer-Mode-in-TRAKTOR


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Thanks, I watched a video that shows the same - it looks like the problem lies on my macbook as it's not recognising the mic input. Have ordered an audio interface usb - will give it a go once thats delivered, hopefully tomorrow!! Thanks for the link bud!!