I wondered initially if this was a winamp port for older macs.
It requires macOS 13.0 (High Sierra, 2017) or later, which is several releases after it stopped being called OS X. 10.11 (El Capitan, 2015) was the last OS X.
(I personally would accept someone referring to High Sierra as “OS X” because it’s still version 10 of the Macintosh OS, even if Apple dropped that branding a few years earlier.)
It requires macOS 13.0 (High Sierra, 2017) or later, which is several releases after it stopped being called OS X. 10.11 (El Capitan, 2015) was the last OS X.