How to download and install macOS - Apple Support
Dec 18, 2025 · Download and install current or previous versions of the Mac operating system on compatible Mac computers.
Mac - Official Apple Support
Learn how to set up and use your Mac computer. Find all the topics, resources, and contact options you need for Mac.
Find out which macOS your Mac is using - Apple Support
Use About This Mac to see the version of Mac operating system installed on your Mac.
Update macOS on Mac - Apple Support
Dec 5, 2025 · Update macOS on Mac To maintain your computer's security, stability, and compatibility, Apple recommends using the latest macOS that is compatible with your Mac. macOS updates and …
确定你的 Mac 使用的是哪个 macOS 版本 - 官方 Apple 支持 (中国)
确定你的 Mac 使用的是哪个 macOS 版本 使用“关于本机”确定 Mac 上安装的是哪个 Mac 操作系统 (macOS)，并了解它是不是最新版本。 安装的是哪个 macOS 版本？ 哪些 macOS 版本是最新的？ …
Create a bootable installer for macOS - Apple Support
Oct 15, 2025 · Choose your language, if prompted. Select Install macOS (or Install OS X) from the Utilities window, then click Continue and follow the onscreen instructions.
如何下載和安裝 macOS - Apple 支援 (台灣)
如何下載和安裝 macOS 使用下列任一方法在相容的 Mac 電腦上，下載並安裝最新版或舊版 Mac 作業系統。每個 macOS 都包含適用於該 macOS 的最新內建 App，包括 Safari、「郵件」和 Apple …
How to start up from macOS Recovery - Apple Support
Oct 29, 2025 · macOS Recovery is your computer’s built-in recovery system, with utilities to reinstall macOS, repair or erase your startup disk, restore from a Time Machine backup, and more. Follow …
OS X El Capitan Manuals and Downloads - Apple Support
Download OS X El Capitan 10.11.6 Combo Update Download Bluetooth Update for MacBook Download OS X El Capitan 10.11.4 Combo Update Download OS X El Capitan 10.11.3 Combo Update …
macOS Catalina - Technical Specifications - Apple Support
macOS Catalina - Technical Specifications General Requirements OS X 10.9 or later 4GB of memory 12.5GB of available storage (OS X El Capitan 10.11.5 or later)* Some features require an Apple ID; …