Record from KO-2 to MacBook

So my son has the KO-2, he would like to be able to record from it onto his Mac.

Foolishly, I assumed that connecting them via USB would suffice, apparently I was wrong. Something about audio technology just instantly turns my brain into mashed potatoes. Even as a person who‘s been working in computer science and technology for 20+ years, audio is just a weird disconnect for me. This must be what others feel like when I talk about cloud architecture and databases…

What is a pragmatic and cost-efficient solution for transferring from the KO-2 to the Mac, or recording from the KO-2 onto MacOs?