Read reviews, compare customer ratings, see screenshots, and learn more about Apple Developer. Download Apple Developer and enjoy it on your iPhone, iPad, iPod touch, Mac OS X 10.15 or later, or Apple.
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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.
- Dec 06, 2017.
- Jul 31, 2020.
- Aug 27, 2020.
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
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.
Chrome Download Apple 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.
Apple Mac Os Download
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.
TeamViewer for Mac
- Establish incoming and outgoing connections between devices
- Real-time remote access and support
- Collaborate online, participate in meetings, and chat with others
- Start using TeamViewer for free immediately after downloading
Buy a license in order to use even more TeamViewer features
Check out additional TeamViewer remote desktop support and collaboration downloads
Immediate assistance:
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TeamViewer QuickSupport
Optimized for instant remote desktop support, this small customer module does not require installation or administrator rights — simply download, double click, and give the provided ID and password to your supporter.
Join a meeting:
TeamViewer QuickJoin
Easily join meetings or presentations and collaborate online with this customer module. It requires no installation or administrator rights — just download, double click, and enter the session data given to you by your meeting organizer.
Unattended access:
TeamViewer Host
TeamViewer Host is used for 24/7 access to remote computers, which makes it an ideal solution for uses such as remote monitoring, server maintenance, or connecting to a PC or Mac in the office or at home. Install TeamViewer Host on an unlimited number of computers and devices. As a licensed user, you have access to them all!
Apple Mac Download Messages
Previous versions:
Apple Operating System Downloads
These downloads are only recommended for users with older licenses that may not be used with the latest release of TeamViewer.
Apple Mac Download Contacts
See previous versions
Supported operating systems
Supported operating systems