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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
Install Macos Sierra 10.12 16a323 Dmg 1
- 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.
macOS Sierra is coming this fall with plenty of awesome new features that developers can take advantage of in their apps; as such, Apple is releasing early beta software so that developers can make their apps work seamlessly when the full operating system launches to the public.
Apple occasionally offers updates to iOS, watchOS, tvOS, and macOS as closed developer previews or public betas for iPhone, iPad, Apple TV and Mac (sadly, no public beta for the Apple Watch). While the betas contain new features, they also contain pre-release bugs that can prevent the normal use of your iPhone, iPad, Apple Watch, Apple TV, or Mac, and are not intended for everyday use on a primary device. That's why we strongly recommend staying away from developer previews unless you need them for software development, and using the public betas with caution. If you depend on your devices, wait for the final release.
How to make an archived backup of your Mac with Time Machine
Before you begin, make sure you back up your Mac. The download and installation process is fairly easy, but any time you make significant changes to your computer, you risk problems. When it comes to securing your data, it is definitely better to be safe than sorry. Even if you just backed everything up the night before, make sure your Mac is completely up-to-date.
- Connect an external hard disk or Time Capsule with a USB, FireWire, or Thunderbolt cable.
- Click on the Apple icon () in the upper left corner of your screen.
- Select System Preferences... from the dropdown menu.
Select Time Machine in the System Preferences window.
- Turn the Time Machine slider On.
Click Select Backup Disk and choose the disk you'd like to use.
Time Machine will format the hard drive for backups and start within two minutes.
How to download the macOS Sierra developer beta
Downloading the latest beta on your Mac is as simple as visiting Apple's developer portal.
- Visit developer.apple.com on your Mac.
- Click on the Develop tab.
Click on the Downloads tab.
- Log in with your developer account.
Scroll down and click on the Download button for macOS 10.12.3. The file will automatically download to your Mac.
- Open your Downloads window and select macOS Sierra Developer Beta Access Utility.
Double-click macOSSierraDeveloperBetaAccessUtility.pkg to run the installer.
When the installer is finished downloading, the Mac App Store will automatically open to the Updates section. Click Update to download and install the developer beta software. After the software has been downloaded, your Mac will automatically restart.
If the latest developer beta does not appear on the Updates list, restart your Mac. Then, open the Mac App Store and click the Updates tab.
The developer beta update can take a long time to finish downloading, depending on the size. You can check the status in the Updates tab of the Mac App Store.
How to install the macOS Sierra developer beta
After macOS Sierra is finished downloading, you will be prompted to install the software automatically.
- Click on Continue.
- Agree to Apple's Terms and Conditions.
- Click on Install.
- Follow the instructions to install macOS Sierra.
Your Mac will reboot to install macOS Sierra. You'll see a black screen with the Apple Logo and a progress bar. Grab a cup of coffee while you wait for the software to finish installing.
How to get started with the macOS Sierra developer beta
Once your Mac reboots, you'll be set up with macOS Sierra. You'll have to follow a couple of steps to get started.
- Click on Continue.
- Sign in with your Apple ID and password. iCloud will sync your desktop and other files.
- Click on Get Started.
You'll be directed to your Home screen where you can start digging around to find all of the fun new features.
Update July 5, 2017: Apple has just released macOS Sierra 10.12.6 beta 6 for developers. If you already have the macOS Sierra beta installed, head to Mac App Store > Updates and download away. If you've been waiting for beta 6 to start testing macOS 10.12.6, keep reading and we'll walk you through the setup!
Running beta software
Main
macOS Catalina
Install Macos Sierra 10.12 16a323 Dmg Update
Main
Install Macos Sierra 10.12 16a323 Dmg File
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