[aspaceman]

Very first result for "cargo tool programming"

https://binx.io/blog/2018/11/27/learning-cargo/

You're getting snark because your own snarky comment is the equivalent of saying "Why do I need Make to run it on the MacOS?" If you had asked instead, "What is cargo, and how do I install it?" you would get more helpful responses. Snark is met with snark.

[mrtksn]

And how people are supposed to know that it is a programming tool? I assumed that it is yet another package manager and googling about cargo brings results about logistics.

It took me a few tries before figuring it out. What worked was "Install cargo MacOS" and it was hard to tell if the results are not a scam to make me install some spyware.

[sciurus]

You assumed right, Cargo is the Rust package manager