The phrase "reference release" means that the software is distributed as a stand-alone system software package that can be installed regardless of the version of OS X currently installed (assuming the Mac is compatible with the reference release). Note: You should not install OS X versions that are older than what came with your computer.
What is an OS X reference release?
Learn what a "reference release" of the Mac OS is.
This article has been archived and is no longer updated by Apple.
Published Date:Tue Nov 01 18:43:55 GMT 2016