Apple’s introduction of OS X 10.11 El Capitan during the WWDC 2015 keynote speech signaled the next-generation of the software that powers all of the company’s Mac computers. Last year’s reveal of OS X 10.10 Yosemite introduced a bold new flat interface to match the aesthetics of iOS, its mobile counterpart, and while El Capitan is more of an evolutionary progression, it does still contain some excellent improvements. The first developer beta of El Capitan, which is available now, answers a few compatibility questions by confirming that the latest operating system will be compatible with all Macs that are capable of running OS X 10.10 Yosemite.

Apple’s official OS X 10.11 release notes on its developer portal provide additional information on the system requirements that are needed to install and run El Capitan. The support page also has a brief introduction to the initial developer beta by stating that it is “prerelease software” and that it should never be used in a commercial operating environment.

OS X El Capitan Compatible Macs main

Interestingly, the information contained within pretty much confirms that if your Mac is capable of running Yosemite then you will have no problem with OS X 10.11. The official supported Macs are as follows:

  • iMac (Mid 2007 or newer).
  • MacBook Air (Late 2008 or newer).
  • MacBook (Late 2008 Aluminium, or Early 2009 or newer).
  • Mac mini (Early 2009 or newer).
  • MacBook Pro (Mid/Late 2007 or newer).
  • Mac Pro (Early 2008 or newer).
  • Xserve (Early 2009).

In the months leading up to this year’s WWDC, it was heavily speculated that any iOS 9 and OS X 10.11 developments would be heavily focused on introducing significant performance and reliability improvements rather than bringing massive wholesale changes and feature upgrades. That was all but confirmed during the keynote, with the El Capitan release seemingly focused on trying to make Macs of all ages feel more responsive, noticeably faster and more efficient.


According to Apple, this has been more than achieved. OS X El Capitan marketing material focuses on what the company calls “across-the-board performance” with app launching now up to 1.4x faster. Those who regularly switch between active applications can also expect to benefit from 2x faster switching as well as the ability to open and interact with PDF documents within Preview up to 4x faster.

The list of improvements and functionality updates within OS X 10.11 obviously extends way above and beyond launching apps and opening large documents, but it’s great to see that the platform is not only being dramatically improved but also offering compatibility with as many devices as possible.

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