Download macOS Sierra 10.12.1 Update The macOS Sierra 10.12.1 update improves the stability, compatibility, and security of your Mac, and is recommended for all users. This update: Adds an automatic smart album in Photos for Depth Effect images taken on iPhone 7 Plus; Improves the compatibility of Microsoft Office when using iCloud Desktop.
Check compatibility
You can upgrade to macOS Sierra from OS X Lion or later on any of the following Mac models. Your Mac also needs at least 2GB of memory and 8.8GB of available storage space.
MacBook introduced in late 2009 or later
MacBook Air introduced in late 2010 or later
MacBook Pro introduced in mid 2010 or later
Mac mini introduced in mid 2010 or later
iMac introduced in late 2009 or later
Mac Pro introduced in mid 2010 or later
To find your Mac model, memory, storage space, and macOS version, choose About This Mac from the Apple menu . If your Mac isn't compatible with macOS Sierra, the installer will let you know.
Make a backup
Before installing any upgrade, it’s a good idea to back up your Mac. Time Machine makes it simple, and other backup methods are also available. Learn how to back up your Mac.
Get connected
It takes time to download and install macOS, so make sure that you have a reliable Internet connection. If you're using a Mac notebook computer, plug it into AC power.
Download macOS Sierra
For the strongest security and latest features, find out whether you can upgrade to macOS Catalina, the latest version of the Mac operating system.
If you still need macOS Sierra, use this link: Download macOS Sierra. A file named InstallOS.dmg will download to your Mac.
Install the macOS installer
Double-click the downloaded file to open a window showing its contents. Then double-click the file within, named InstallOS.pkg.
Follow the onscreen instructions, which will guide you through the steps necessary to install.
Begin installation
After installation of the installer is complete, open the Applications folder on your Mac, then double-click the file named Install macOS Sierra.
Click Continue and follow the onscreen instructions. You might find it easiest to begin installation in the evening so that it can complete overnight, if needed.
Allow installation to complete
Please allow installation to complete without putting your Mac to sleep or closing its lid. Your Mac might restart, show a progress bar, or show a blank screen several times as it installs both macOS and related updates to your Mac firmware.
Learn more
- If you have hardware or software that isn't compatible with macOS Sierra, you might be able to install the previous version, OS X El Capitan.
- macOS Sierra won't install on top of a later version of macOS, but you can erase your disk first or install on another disk.
- You can use macOS Recovery to reinstall macOS.
Siri Comes to Mac with All-New Capabilities for the Desktop
- Messages makes conversations more interesting, allowing users to preview web links and play video clips from right within the app; respond to messages with a Tapback like a heart, thumbs up and more directly onto a message bubble; and send bigger emoji for more message impact.
- Tabs are now available across Mac apps that support multiple windows, including Maps, Mail, Pages, Numbers, Keynote, TextEdit, and even third-party apps.
- Picture in Picture floats video from Safari or iTunes in a window over the desktop. The window can be resized, dragged and pinned to any corner of the screen so users can watch video while they work.
- Optimized Storage frees up space when a Mac starts getting full by storing infrequently used items in the cloud and helping users remove apps and files they no longer need.
- Apple Music in iTunes makes it even easier to discover new music and browse exclusives and new releases.
Availability
Images from macOS Sierra
Apple revolutionized personal technology with the introduction of the Macintosh in 1984. Today, Apple leads the world in innovation with iPhone, iPad, Mac, Apple Watch and Apple TV. Apple’s four software platforms — iOS, macOS, watchOS and tvOS — provide seamless experiences across all Apple devices and empower people with breakthrough services including the App Store, Apple Music, Apple Pay and iCloud. Apple’s 100,000 employees are dedicated to making the best products on earth, and to leaving the world better than we found it.
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