Plan9Port works on Mac OS, Linux, several BSDs etc, and I'm nearly 100% certain existed before Russ moved to google. It pre-dates Go by a bit for sure, and Go

Plan9Port works on Mac OS, Linux, several BSDs etc, and I'm nearly 100% certain existed before Russ moved to google. It pre-dates Go by a bit for sure, and Go was already underway at Google with Rob Pike before Russ came over (per my recollection). That said, I too use plan9port, on my mac, for Acme mainly. Russ just fixed up the thread library so it works more uniformly (and correctly) on all platforms - including Apple Silicon.