Before we got an “ION Tape Express Cassette Conversion System” which seems work just fine, (I only used it once so far to make sure it worked.) I converted a few tapes by playing them on our cassette recorder/player in a foam lined cardboard box with a old microphone, that I had laying about, plugged into my iMac’s audio input jack and recording with Quicktime (this software came with the iMac). As long as nothing loud happened during the recording, it work surprisingly well! The big advantage for the “ION Tape Express Cassette Conversion System” is that it is immune to ambient noise.
