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MacOS Big Sur (11)
MacOS 11, the first version to run on Apple Silicon (the original M1 Macs) alongside Intel, and the last version numbered in the classic 10.x-then-11 style before Apple's later year-based renumbering.
プラットフォーム
MacOS
リリース日
November 2020
サポート終了日
サポート継続中
システム要件
MacBook (2015 or later), MacBook Air (2013 or later), MacBook Pro (2013 or later), Mac mini (2014 or later), iMac (2014 or later), Mac Pro (2013 or later).
Big Sur was a genuine inflection point for the Mac platform: it shipped as the very first MacOS version to support Apple's own M1 chip, running side by side with continued Intel Mac support, and introduced the current squared-off icon style and Control Center. It's still a realistic choice for 2013-2015-era Intel Macs that can't take a newer MacOS version at all, and Apple's Mac App Store listing for it remains a real, working official download for exactly that use case -- genuinely still in service, not merely archived.
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。