Original Link: https://www.anandtech.com/show/9617/apple-announces-release-dates-for-ios-9-watchos-2-and-os-x-el-capitan
Apple Announces Release Dates for iOS 9, watchOS 2, and OS X El Capitan
by Brandon Chester on September 9, 2015 6:55 PM ESTToday Apple made a number of new announcements at their fall 2015 event. There are two new iPhones, two new iPads, and a new Apple TV set top box. Buried underneath the avalanche of product announcements were the confirmations of when the upcoming updates to Apple's three current operating systems would be released.
According to Apple, both iOS 9 and watchOS 2 will be launching one week from now on September 16th. iOS 9 supports all devices with an A5 SoC or newer. For iPads this includes everything except the original iPad, which is really impressive when you consider that the iPad 2 launched in early 2011 with a version of iOS 4. The supported models of the iPod Touch include the iPod Touch 5 and the new iPod Touch 6 which is almost identical to the 5th gen on the outside but has Apple's A8 SoC. Supported iPhones include the iPhone 4s and any iPhone released afterward.
As for OS X El Capitan, it will be launching on September 30th, which is just a bit later than iOS 9 and watchOS 2. As for supported devices, the system requirements are unchanged from OS X Yosemite so if your Mac can run that then it can run El Capitan.