Your mac also needs at least 2gb of memory and 12.5gb of available storage space, or up to 18.5gb of storage space when upgrading from os x yosemite or earlier. macbook introduced in early 2015 or later. Upgrade from os x v10.9 mavericks to os x yosemite if your mac can run os x mavericks, it can run os x yosemite.; back up your mac.; get os x yosemite from the mac app store.; double-click install os x yosemite to begin installation.. Os x yosemite (/ j o
