what is the product name for os x version 10.11
macOS version history With the exception of Mac OS X Server 1.0 and the original public beta, the first several macOS versions were named after big cats. Prior to its release, version 10.0 was code named "Cheetah" internally at Apple, and version 10.1 was code named internally as "Puma". After the code name "Jaguar" for version 10.2 received publicity in the media, Apple began openly using the names to promote the operating system: 10.3 was marketed as "Panther", 10.4 as "Tiger", 10.5 as "Leopard", 10.6 as "Snow Leopard", 10.7 as "Lion", and 10.8 as "Mountain Lion". "Panther", "Tiger", and "Leopard" were registered as trademarks, and Apple registered "Lynx" and "Cougar", but these were allowed to lapse,[10] with Apple instead using the name of iconic locations in California for subsequent releases: 10.9 was called "Mavericks", 10.10 was called "Yosemite", 10.11 was called "El Capitan", and 10.12 was called "Sierra".