From Yosemite to Mavericks
Can I install OS X Mavericks as a second system on my MacBook Air, bought with the installed OS X Yosemite?
MacBook Air (11-inch, Early 2014), OS X Yosemite (10.10.5)
Can I install OS X Mavericks as a second system on my MacBook Air, bought with the installed OS X Yosemite?
MacBook Air (11-inch, Early 2014), OS X Yosemite (10.10.5)
Usually you can't run an older version of OS X on a machine that shipped with a newer version.
From Yosemite to Mavericks