Select your Operating System below: 1  OSX 10.11 and newer. 2  OSX 10.10 and older. 3  Click on the Apple logo in the upper-left corner of your screen.  Click on the Apple logo in the upper-left corner of your screen.
Part of the Open source glossary: Also see open and Open Source. In information technology, proprietary describes a technology or product that is owned exclusively by a single company that carefully guards knowledge about the technology or the product's inner workings.n information technology, proprietary describes a technology or product that is owned exclusively by a single company that carefully guards knowledge about the technology or the product's inner workings.
Proprietary software may also have licensing terms that limit the usage of that software to a specific set of hardware. Apple has such a licensing model for Mac OS X, an operating system which is limited to Apple hardware, both by licensing and various design decisions.