Comment by grahamar

As Google bragged in 2013 that it managed a Mac fleet of over 40k and with a workforce of 55,419 in Q1 2015 (not just engineers, 2013 numbers were about 10k engineers), that's 72%+ of Google's workforce using Macs.

Homebrew is at least one of the best package managers for Mac. I would be very surprised if it was not at least near the 90% mark...