If you have older hardware, you may hesitate, thinking that El Capitan might slow down your Mac. El Capitan will run on all Macs that can run Yosemite, so if you’re running OS X 10.10, you should consider upgrading to OS X 10.11. OS X El Capitan is now available, and it’s time to upgrade your Mac to Apple’s new operating system, if you so desire. Apple + Recommended + Security & Privacy OS X El Capitan: Security and Privacy Features Overview
