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.
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.
macOS - Official Apple Support
Learn how to set up and use macOS. Find all the topics, resources, and contact options you need for macOS.
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 …
如何下载和安装 macOS - 官方 Apple 支持 (中国)
如何下载和安装 macOS 使用下面任一方式在兼容的 Mac 电脑上下载并安装最新或以前版本的 Mac 操作系统。每个 macOS 都包含适用于这个 macOS 的最新内建 App，包括 Safari 浏览器、“邮件”和“音 …
Official Apple Support
Learn more about popular features and topics, and find resources that will help you with all of your Apple products.
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？ …
How to reinstall macOS - Apple Support
Dec 10, 2025 · Use macOS Recovery, your computer’s built-in recovery system, to reinstall the Mac operating system.