Here is a list of Mac models that will be compatible with OS X El Capitan: According to Apple’s release notes (subject to change), those running Yosemite are in luck, as Macs that are able to run the current operating system will be able to run OS X El Capitan. Their announcement will lead many to wonder whether their devices or Macs will support the new operating systems. At last week’s WWDC keynote address, Apple announced the latest iteration of OS X with “El Capitan” and its latest mobile operating system with iOS 9.