The upcoming OS X El Capitan contains a number of performance enhancements that greatly improve the efficiency of the system and programs running on it, but along with such features you may be concerned about whether or not your Mac will support them. This may be especially true if you have an older Mac that just barely met the system requirements for OS X Yosemite.
If you have any concerns about your current Mac running El Capitan, then you are in luck, as despite the tweaks and improvements, if your Mac runs OS X Yosemite, then it will run OS X El Capitan. The list of supported systems are the following:
- iMac (Mid 2007 or newer)
- MacBook Air (Late 2008 or newer)
- MacBook (Late 2008 Aluminum, 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)
When Apple released Snow Leopard, it focused on greatly tweaking the OS to remove and update old code, and transition the system to using its newer APIs instead of just getting by. Similarly, El Capitan is implementing new approaches that despite a few tweaks, keep the overall look and feel of Yosemite, so its not a major visual upgrade, but one that should offer you a functional relief or two.