Hello, https://ssl.apple.com/media/us/osx/2012/docs/OSX_for_UNIX_Users_TB_July2011.pdf
and a few other documents online (https://www.google.co.uk/search?q=OS+X+version+10.7+Lion+is+an+Open+Brand+UNIX+03+Registered+Product) claim: "OS X version 10.7 Lion is an Open Brand UNIX 03 Registered Product" Is that true? I can't find any evidence of that on the opengroup.org websites (including historical via web.archive.org) for that particular version of Apple's MacOS/X aka OS X aka macOS. Related: https://unix.stackexchange.com/questions/1489/is-mac-os-x-unix Thanks, Stephane
