If you're using a Mac notebook computer, plug it into AC power. For the strongest security and latest features, find out whether you can upgrade to macOS Catalina, the latest version of the Mac operating system. 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. If the installer asks for permission to install a helper tool, enter the administrator name and password that you use to log in to your Mac, then click Add Helper.
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. Download Mac OS Sierra And a big part of those experiences is ensuring that the apps we offer are held to the highest standards for privacy, security, and content.
Because we offer nearly two million apps — and we want you to feel good about using every single one of them. Stories and collections that inform, help, and inspire. Updated daily. Original stories by our editorial team bring you everything from exclusive world premieres to behind-the-scenes interviews. Tap the Today tab and read about influential developers and game creators, learn a few tips and tricks, or see how apps are changing how people work, play, and live.
Visit the Today tab. Explore in-app events like movie premieres, gaming competitions, and livestreams. Or find them via search and on app product pages. Discover amazing apps with a rich search experience. App product pages give you the information you need when deciding what to download.
Each app is required to ask for your permission so you can choose what data to share. Even if you grant access once, you can revoke it later. We also ensure that apps are denied access to certain sensitive data on your device, are unable to modify your device or OS, and are prohibited from obtaining complete access to your data. System-level protections prevent an app from accessing data from other apps without your explicit permission.
When you download an app, it should work as promised. Which is why human App Reviewers ensure that the apps on the App Store adhere to our strict app review standards. Our App Store Review Guidelines require apps to be safe, provide a good user experience, comply with our privacy rules, secure devices from malware and threats, and use approved business models.
Learn more about the App Store Review Guidelines. You should never have to worry about inappropriate content. We strongly support all points of view being represented on the App Store. But we also take steps to make sure apps are respectful to users with differing opinions, and we reject apps with any content or behavior that we believe is over the line — especially when it puts children at risk.
Every app has an assigned age rating, so parents can determine what is appropriate for their children. Apps must follow an approved business model and clearly show you the price, tell you what you get with your purchase, and explain subscription-renewal terms up front.
Apps help unlock the full potential of your Apple devices. Apple products use industry-leading technology to bring apps to life — so you can experience more of the amazing things your devices are capable of. Thanks to hardware and software designed to work together, you get more out of your apps — from things you take for granted, like supersmooth scrolling, to seeing how a new sofa might look in your living room before you buy it.
For example, it might say that it's not compatible with this device or is too old to be opened on this version of macOS. To confirm compatibility before downloading, check the minimum hardware requirements:. Time Machine makes it simple, and other backup methods are also available. Safari uses these links to find the old installers in the App Store. After you download the installer from the App Store, the installer opens automatically.
Safari downloads the following older installers as a disk image named InstallOS.
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