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OS X Yosemite (10.10)
OS X 10.10, which introduced the flat, iOS 7-inspired visual redesign that replaced OS X's older skeuomorphic look — still officially downloadable via Apple's support article for the oldest eligible Macs.
プラットフォーム
MacOS
リリース日
October 2014
サポート終了日
サポート継続中
システム要件
MacBook (Late 2008 or later, aluminum, or early 2009 or later), MacBook Air (Late 2008 or later), MacBook Pro (Mid/Late 2007 or later), Mac mini (Early 2009 or later), iMac (Mid 2007 or later), Mac Pro (Early 2008 or later).
Yosemite was a major visual break from every prior OS X version, replacing over a decade of skeuomorphic textures (leather, felt, wood-grain UI elements) with a flat, translucent design language clearly influenced by iOS 7, and introduced Handoff for continuing work between a Mac and an iPhone/iPad. It remains one of the versions Apple's own official support article still provides a real download path for, for the small remaining population of 2007-2009 Macs too old for anything newer.
リリース日、サポート期間、システム要件はMicrosoftおよびAppleの公式ライフサイクルページ（上記リンク）に基づいています — サポートポリシーは随時変更されるため、本番環境や企業での意思決定にこれらの情報を利用する前に、必ず公式ページでご確認ください。