Can't locate "Line In" option on Mac

on my Mac Book for Air 2013, i don’t see any option to record “line-in” only 'built in microphone", am i missing something obvious?
my phono cables are connected to 8mm jack into mic in mac.

It may not have one. This is what it looks like on an early Macbook Pro.

The 13" MBP had one connection that did both jobs, record and playback. It was your job to switch between them in System Preferences.

I don’t know how the Air works. Since light weight was the big deal with the Air, I wouldn’t be shocked if it didn’t have one. None of the latest models do.

Go into Apple (upper left) > System Preferences > Sound. If Line-In doesn’t appear there, then there isn’t one.

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If your Air has regular USB ports, you can make stereo line in and out with a Behringer UCA-202.