Why don't you just download the real Winamp 2.9 and save yourself the potential GB of RAM usage?

Probably because he is on macOS or Linux.

I'm sittin' here playing SPC files via Winamp in OSX (using Wine). Works a treat.

For macOS users, I can vouch for Vox (https://vox.rocks/mac-music-player). I was a Winamper for years until I moved to Mac and lost it, Vox is a decent replacement.

winamp 2 almost certainly runs fine under wine.

Or if you don't need a genuine Winamp, Audacious Media Player has an optional Winamp-style interface that supports Winamp skins and looks and feels almost identical.

Indeed, except for video playback. Also, the minibrowser looks dead. Also, I try to update WineHQ WinAmp 2.x entry

I spent a fair amount of today actually trying to get winamp via wine on MacOS High Sierra... no joy (doesn't show any audio devices for dx9)

You can try nativefier[1]. I did this to Soundcloud.com (for the sake of an easy Alt+Tab), and it works just fine.

[1] https://github.com/jiahaog/nativefier

There are a few people working on it: https://github.com/captbaritone/winamp2-js/issues/394