Apple
Relationship between Wikimedia and Apple.
As of December 2015, "most" of the Wikimedia Foundation staff use Apple computers with MacOS.[1]
The Wikimedia Foundation listed "Apple Inc. Matching Gifts Program" as a "leading donor" ($5,000-$14,999) in 2011-12, a "patron" ($15,000-$49,999) every year from 2012-13 until 2015-16, a "major Benefactor" ($50,000+) in 2016-17,[2] and again as a "major benefactor" for gifts since July 2017.[3] (The WMF has not produced annual benefactor reports since then.)
Over 40% of Wikimedia mobile traffic comes from users using Apple's iOS and 38% from users using Apple's Safari browser, and 11% of desktop traffic comes from users using Mac OS X and 4% from Safari, as of 2019.[4] There is a Phabricator project for issues relating to Apple Safari. The WMF also develops the Wikipedia app for iOS. See iOS team.