Getting audio from cassettes to computer with Audacity

I have old field recordings and interviews which I made years ago with a Sony Walkman Professional recorder and now I want to transfer these onto my Mac using Audacity. When I plugged eveything in and hit record I got a recording from the Mac’s in built mic and not the audio directly from the Walkmac to the Mac. I just want get the audio from the tape machine in to the programme.
Can anyone help? :question:

You need to tell the computer what input to record from, it isn’t a mind reader (yet). Go to Audio Midi setup, and select line in as the default recording source. Now you should be able to hit record and it will work.

For more instructions see the wiki: