How do i record a mix with Xone 23:c and Crossvibes LE?

Hi,
I've been reading every post on this forum and searching the internet frantically, but nothings helping me.
I'm trying to record a mix from my Xone 23:c, used with two technics SL210s and timecoded vinyl. i understand i cannot record the mix straight off the Cross LE software using the external mixer.
But how am i to do it with audacity? I have an rca to jack plugged in from the mixer's record output into my Macbook Pros audio jack input/output.
I do not seem to have an option in audacity to select the jack input, yet do have the option to select the Xone 23:c !? I'm very confused. I think the softwares awful for recording, and shouldn't be so difficult to do with the pair hardware (the xone 23:c)! It should be configured in someway.
I've been reading every post on this forum and searching the internet frantically, but nothings helping me.
I'm trying to record a mix from my Xone 23:c, used with two technics SL210s and timecoded vinyl. i understand i cannot record the mix straight off the Cross LE software using the external mixer.
But how am i to do it with audacity? I have an rca to jack plugged in from the mixer's record output into my Macbook Pros audio jack input/output.
I do not seem to have an option in audacity to select the jack input, yet do have the option to select the Xone 23:c !? I'm very confused. I think the softwares awful for recording, and shouldn't be so difficult to do with the pair hardware (the xone 23:c)! It should be configured in someway.