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  1. macOS High Sierra. macOS High Sierra (マックオーエス ハイ シエラ)は、 Apple が開発した Mac 向けの オペレーティングシステム (OS)。. macOS シリーズの14番目のバージョンである。. バージョンナンバーは10.13。. macOS Sierra の後継バージョンとして、 2017年 6月5日 ...

  2. Apr 10, 2024 · Follow the appropriate steps based on whether the Mac receiving the macOS installation is a Mac with Apple silicon. Mac with Apple silicon. Shut down or turn off the Mac. Connect the bootable installer to the Mac. This Mac must be compatible with the macOS that you're installing. If it isn't, it might start up to a circle with a line through it.

  3. Jun 20, 2019 · When you compare macOS Catalina with macOS High Sierra, the differences are huge, so it’s well worth it if you haven’t upgraded already. However, you should definitely take steps to clear the junk from your Mac before installing the newer macOS. CleanMyMac X can do that for you quickly and easily.

  4. Sep 25, 2017 · macOS High Sierra is supported on the following Macintosh computers: iMac: Late 2009 or later; MacBook: Late 2009 or later; MacBook Pro: Mid 2010 or later; MacBook Air: Late 2010 or later; Mac Mini: Mid 2010 or later; Mac Pro: Mid 2010 or later; macOS High Sierra requires at least 2 GB of RAM and 14.3 GB of available disk space.

  5. Apr 11, 2018 · Go to the High Sierra product page in the Mac App Store. The Download button will be replaced by an Open button. Click on it to start the installation. In the Mac App Store app, click on the ...

  6. Download Security Update 2019-001 (High Sierra) Download Security Update 2018-003 (High Sierra) Download Security Update 2018-002 (High Sierra) Download macOS High Sierra 10.13.6 Supplemental Update for MacBook Pro (2018) Download macOS High Sierra 10.13.6 Update. Download macOS High Sierra 10.13.6 Combo Update.

  7. Jul 19, 2021 · Otherwise, you'll need to format to "Mac OS Extended (Journaled)" for El Capitan and earlier. When you're sure about your decision, click "Erase" and confirm. Finally, quit Disk Utility and select "Reinstall macOS" or "Install macOS" (or Mac OS X, for older versions) from the macOS Utilities window. Follow the rest of the prompts to finish the ...

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