Connecting Tape Deck - No Sound

I think the mac might be confusing the device as a mic. I'd look into seeing if you could 'record' the input from the device, and then play it back from that recording to verify.

 

what exactly are you trying to do?

if you want to record from the tape, use something like audacity.

 

I think you are right.

With out software out output the input, you would be able to hear it.

Exactly.

To the OP: I can't remember the name of the software that I used to copy my vinyl to mp3, but it is in the Mac App Store. There was a couple of when I did a search, and I think I picked a free to try one, then purchased it after seeing the results.

I am sure there are plenty in the store, and probably some free ones for the basic payback that you are looking to do.

If you want to use Apple's software, I think Garage Band would work for this I think. At a minimum you are make a copy of the cassette, and play it back later.