[humanistbot]

I'd argue Mac OS X is proprietary UNIX, but I'll admit to that being a bit pedantic.

[pavlov]

In the spirit of pedantry, I’ll point out it’s actually called macOS these days.

The ‘X’ and capitalization went away when they finally bumped the version number to 11.

[agsnu]

Actually, it was changed to macOS in 2016 for 10.12 Sierra, to align the branding across Apple's various platforms (iOS/macOS/tvOS/watchOS).

[Bondi_Blue]

It's definitely partially proprietary, and it is definitely a Unix operating system.

[yokoprime]

It's certified, so I would say it counts as proprietary Unix

[mrweasel]

Interestingly enough Solaris isn't certified.

At a previous employer we would run a large number of Oracle installations on Solaris, on Oracle hardware (SPARC64). I don't think that uncommon.

[Annatar]

Solaris is UNIX 03 certified. Solaris is actually a reference implementation platform for:

- TCP / IP; - NFS; - POSIX; - XPG4; - XPG6; - SVR4.

[mrweasel]

Didn't Oracle stop paying for the certifications a few years ago? Solaris certainly was certified at some point.

[vladak]

Yep. Two of my local colleagues were actively working with Open Group until then, fixing UNIX compliance bugs, running the test suites, producing the reports etc.

[throwawayacc3]

>Solaris is actually a reference implementation platform for:

Was actually. It is no longer a reference platform for TCP/IP, NFS, etc.