Reinstall from macOS Recovery
Apple T2 安全芯片 MacBook Air 采用 Apple T2 安全芯片,这款由 Apple 设计的第二代定制化 Mac 芯片进一步提升了 MacBook Air 的安全性。因此,当你使用触控 ID 解锁 Mac 或文档时,都能确保个人信息的安. 2020-9-10 探索适合各种 Apple 产品的 Apple 新配件。率先体验 Apple 的最新技术。在线购买并享受免费送货服务。 11 英寸 iPad Pro (第二代) 12.9 英寸 iPad Pro (第四代). Explore the new system architecture of Apple Silicon Macs Discover how Macs with Apple Silicon will deliver modern advantages using Apple's System-on-Chip (SoC) architecture. Leveraging a unified memory architecture for CPU and GPU tasks, Mac apps will see amazing performance benefits from Apple Silicon tuned frameworks such as Metal.
macOS Recovery makes it easy to reinstall the Mac operating system, even if you need to erase your startup disk first. All you need is a connection to the Internet. If a wireless network is available, you can choose it from the Wi-Fi menu , which is also available in macOS Recovery.

1. Start up from macOS Recovery
To start up from macOS Recovery, turn on your Mac and immediately press and hold one of the following sets of keys on your keyboard. Release the keys when you see an Apple logo, spinning globe, or other startup screen.
Command (⌘)-R

Reinstall the latest macOS that was installed on your Mac (recommended).
Option-⌘-R
Upgrade to the latest macOS that is compatible with your Mac.
Shift-Option-⌘-R
Reinstall the macOS that came with your Mac, or the closest version still available.
You might be prompted to enter a password, such as a firmware password or the password of a user who is an administrator of this Mac. Enter the requested password to continue.
When you see the utilities window, you have started up from macOS Recovery.
2. Decide whether to erase (format) your disk
You probably don't need to erase, unless you're selling, trading in, or giving away your Mac, or you have an issue that requires you to erase. If you need to erase before installing macOS, select Disk Utility from the Utilities window, then click Continue. Learn more about when and how to erase.
3. Install macOS
When you're ready to reinstall macOS, choose Reinstall macOS from the Utilities window. Then click Continue and follow the onscreen instructions. You will be asked to choose a disk on which to install.
- If the installer asks to unlock your disk, enter the password you use to log in to your Mac.
- If the installer doesn't see your disk, or it says that it can't install on your computer or volume, you might need to erase your disk first.
- If the installer is for a different version of macOS than you expected, learn about macOS Recovery exceptions.
- If the installer offers you the choice between installing on Macintosh HD or Macintosh HD - Data, choose Macintosh HD.
Please allow installation to complete without putting your Mac to sleep or closing its lid. During installation, your Mac might restart and show a progress bar several times, and the screen might be empty for minutes at a time.

If your Mac restarts to a setup assistant, but you're selling, trading in, or giving away your Mac, press Command-Q to quit the assistant without completing setup. Then click Shut Down. When the new owner starts up the Mac, they can use their own information to complete setup.
macOS Recovery exceptions
The version of macOS offered by macOS Recovery might vary in some cases:
- If macOS Sierra 10.12.4 or later has never been installed on this Mac, Option-Command-R installs the macOS that came with your Mac, or the closest version still available. And Shift-Option-Command-R isn't available.
- If you erased your entire disk instead of just the startup volume on that disk, macOS Recovery might offer only the macOS that came with your Mac, or the closest version still available. You can upgrade to a later version afterward.
- If your Mac has the Apple T2 Security Chip and you never installed a macOS update, Option-Command-R installs the latest macOS that was installed on your Mac.
- If you just had your Mac logic board replaced during a repair, macOS Recovery might offer only the latest macOS that is compatible with your Mac.
If you can't get macOS Recovery to offer the installer you want, you might be able to use one of the other ways to install macOS.
Other ways to install macOS
- You can also install macOS from the App Store or Software Update preferences. If you can't install macOS Catalina, you might be able to install an earlier macOS, such as macOS Mojave, High Sierra, Sierra, El Capitan, or Yosemite.
- Or create a bootable installer disk, then use that disk to install macOS on your Mac or another Mac.
Uni students can save on the new 13‑inch MacBook Pro in our Education Store.*Shop education pricing
New27-inch modeliMac
MacBook Air
13-inch modelMacBook Pro
Which Mac notebook is right for you?
- 13.3-inch Retina display1
- Up to quad-core Intel Core i7 processor
- Up to 16GB of memory
- Up to 2TB of storage2
- Up to 11 hours of battery life3
- Touch ID
- Backlit Magic Keyboard
- 13.3-inch Retina display1
- Up to quad-core Intel Core i7 processor
- Up to 32GB of memory
- Up to 4TB of storage2
- Up to 10 hours of battery life3
- Touch Bar and Touch ID
- Backlit Magic Keyboard
- 16-inch Retina display1
- Up to 8-core Intel Core i9 processor
- Up to 64GB of memory
- Up to 8TB of storage2
- Up to 11 hours of battery life3
- Touch Bar and Touch ID
- Backlit Magic Keyboard
macOS Big Sur
Doing it all,
in all-new ways.
Free delivery
Get help buying
Have a question? Call a Specialist or chat online.
Call 0800-692-7753.
macOS Catalina
The power of Mac.
Taken further.
Dedicated apps for music, TV and podcasts. Smart new features like Sidecar. Powerful technologies for developers. And your favourite iPad apps, now on Mac.
macOS

macOS is the operating system that powers every Mac. It lets you do things you simply can’t with other computers. That’s because it’s designed specifically for the hardware it runs on — and vice versa.
iCloud
iCloud safely and securely stores your photos, videos, documents, messages, music, apps and more — and keeps them updated across all your devices. So you always have access to what you want, wherever you want it.
Built-in Apps
Powerful creativity and productivity tools live inside every Mac — apps that help you explore, connect and work more efficiently.
Keep your growing library organised and accessible. Perfect your images and create beautiful gifts for sharing. And with iCloud Photos, you can store a lifetime’s worth of photos and videos in the cloud.
Tell stories like never before. A simple design and intuitive editing features make it easy to create beautiful 4K movies and Hollywood-style trailers.
/cdn.vox-cdn.com/uploads/chorus_image/image/65864363/DSC02654.0.jpg)
The easiest way to create great-sounding songs on your Mac. With an intuitive interface and access to a complete sound library, it’s never been easier to learn, play, record and share music like a pro.
This powerful word processor gives you everything you need to create documents that look beautiful. And read beautifully. It lets you work seamlessly between Mac, iOS and iPadOS devices. And work effortlessly with people who use Microsoft Word.
Create sophisticated spreadsheets with dramatic interactive charts, tables and images that paint a revealing picture of your data. Work seamlessly between Mac, iOS and iPadOS devices. And work effortlessly with people who use Microsoft Excel.
Bring your ideas to life with beautiful presentations. Employ powerful tools and dazzling effects that keep your audience engaged. Work seamlessly between macOS, iOS and iPadOS devices. And work effortlessly with people who use Microsoft PowerPoint.
Safari has innovative features that let you enjoy more of the web. In even more ways. Built-in privacy features help protect your information and keep your Mac secure. An updated start page helps you easily and quickly save, find and share your favourite sites. And Siri suggestions surface bookmarks, links from your Reading List, iCloud tabs, links you receive in Messages and more.
Pro Apps
For professionals ready to push their creativity, these industry-leading apps offer maximum control over editing, processing and output of music and film.
Logic Pro puts a complete recording and MIDI production studio on your Mac, with everything you need to write, record, edit and mix like never before. And with a huge collection of full-featured plug-ins along with thousands of sounds and loops, you’ll have everything you need to go from first inspiration to final master, no matter what kind of music you want to create.
Take your Mac to the stage with a full-screen interface optimised for live performance, flexible hardware control, and a massive collection of plug-ins and sounds that are fully compatible with Logic Pro X.
Built to meet the needs of today’s creative editors, Final Cut Pro offers revolutionary video editing, powerful media organisation and incredible performance optimised for Mac computers and macOS Catalina.
Motion is a powerful motion graphics tool that makes it easy to create cinematic 2D and 3D titles, fluid transitions and realistic effects in real time.
Add power and flexibility for exporting projects from Final Cut Pro. Customise output settings, work faster with distributed encoding and easily package your film for the iTunes Store.
The Mac App Store features rich editorial content and great apps for Mac. Explore the Mac App Store
Coming later this yearApple One
Apple Mac New Update
Bundle four Apple services.
And enjoy more for less.
Apple Mac New Os
Apple TV Plus
Get one year of Apple TV+
on us when you buy
an eligible Mac.4
- Try it for free4
Apple Arcade
Apple Mac New Laptops
Get three months of Apple Arcade on us
when you buy an eligible Mac.5
- Try it for free5
Mac for Education
Apple Mac New Version
Power to make big things happen in the classroom.
Mac for Higher Education
Ready for everything uni has to offer.
Mac for Business
Get the power to take your business to the next level.
Upgrade to start your free trial.
