Note: This is a Developer Preview. You must be a registered Apple Mac Developer to download this update.
OS X Yosemite is Apple's newest operating system for Mac.
An elegant design that feels entirely fresh, yet inherently familiar. The apps you use every day, enhanced with new features. And a completely new relationship between your Mac and iOS devices. OS X Yosemite will change how you see your Mac. And what you can do with it.
Redesigned interface.
With OS X Yosemite, we set out to elevate the experience of using a Mac. To do that, we looked at the entire system and refined it app by app. Feature by feature. Pixel by pixel. And we built great new capabilities into the interface that put need-to-know information at your fingertips. The result is that your Mac has a fresh new look, with all the power and simplicity you know and love.
Powerful built-in apps.
One of the best things about a Mac is that it comes loaded with state-of-the-art, beautifully designed apps you’ll love to use every day. In OS X Yosemite, those apps give you new ways to do some of the things you do most. The apps you use to surf the web, read your mail, send messages, and organize files have a simpler, more elegant look, and we’ve enhanced them with great new features.
Mac and iOS.
Use a Mac or an iOS device, and you can do incredible things. Use them together, and you can do so much more. Because now with OS X Yosemite and iOS 8, all your devices work together even more harmoniously. They recognize when they're near each other, enabling brilliant new features that feel magical and yet make perfect sense.
Version 10.10 DP2:
OS X 10.10 Yosemite or later
More information
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OS X Yosemite is Apple's newest operating system for Mac.
An elegant design that feels entirely fresh, yet inherently familiar. The apps you use every day, enhanced with new features. And a completely new relationship between your Mac and iOS devices. OS X Yosemite will change how you see your Mac. And what you can do with it.
Redesigned interface.
With OS X Yosemite, we set out to elevate the experience of using a Mac. To do that, we looked at the entire system and refined it app by app. Feature by feature. Pixel by pixel. And we built great new capabilities into the interface that put need-to-know information at your fingertips. The result is that your Mac has a fresh new look, with all the power and simplicity you know and love.
Powerful built-in apps.
One of the best things about a Mac is that it comes loaded with state-of-the-art, beautifully designed apps you’ll love to use every day. In OS X Yosemite, those apps give you new ways to do some of the things you do most. The apps you use to surf the web, read your mail, send messages, and organize files have a simpler, more elegant look, and we’ve enhanced them with great new features.
Mac and iOS.
Use a Mac or an iOS device, and you can do incredible things. Use them together, and you can do so much more. Because now with OS X Yosemite and iOS 8, all your devices work together even more harmoniously. They recognize when they're near each other, enabling brilliant new features that feel magical and yet make perfect sense.
Version 10.10 DP2:
- iCloud Documents & Data created with OS X Yosemite Developer Preview will be deleted from the servers at some point during the beta period. Your devices using the Developer Preview will maintain copies of those deleted iCloud Documents & Data. iCloud Documents & Data managed with iOS 7 or OS X Mavericks will remain unaffected.
- iCloud Documents & Data created with OS X Yosemite Developer Preview will not sync with with Documents and Data managed with iOS 7, OS X Mavericks, or earlier operating systems.
- The UI for managing iCloud Documents & Data does not show the documents and data for iOS 8 Beta and OS X Yosemite Developer Preview. It only shows the documents and data synced with previous operating systems.
- Changes to iCloud Documents & Data in Pages, Numbers, and Keynote on Macs using OS X Yosemite Developer Preview are only available on other devices using OS X Yosemite Developer Preview or iOS 8.0 beta. Any changes from devices using earlier versions of OS X or iOS will not be available. Changes will also not be visible in Pages, Numbers, and Keynote on iCloud.com.
- Only iPhoto 9.5.1 and Aperture 3.5.1 will run on OS X Yosemite Developer Preview 2. Older versions of iPhoto and Aperture will not launch.
- Subpixel rendering is now on by default for all web content. Web sites or in-app web views with extremely tight design constraints may render differently.
- In OS X Yosemite Developer Preview 2, CSS object model getters will return fractional double values based on subpixel layout and rendering metrics instead of rounded integral values.
- Access the complete release notes.
OS X 10.10 Yosemite or later
More information
Download Now