Check compatibility

You can upgrade to OS Yosemite on any of the following Mac models. Your Mac also needs at least 2GB of memory and 8GB of available storage space.

1. But what hasn't changed is how you get it—following in the footsteps of Mavericks, OS X 10.10 Yosemite is offered as a free upgrade, newly available to download from the Mac App Store.
2. OS X Yosemite download. Ask them to download the Mac OS X installer for you. Luckily the copy of OS X isn't locked to their account so it will install on any Mac.

MacBook introduced in 2009 or later, plus MacBook (13-inch, Aluminum, Late 2008)
MacBook Air introduced in late 2008 or later
MacBook Pro introduced in mid 2007 or later
Mac mini introduced in early 2009 or later
iMac introduced in mid 2007 or later
Mac Pro introduced in early 2008 or later
Xserve models introduced in early 2009

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 OS X Yosemite, the installer will let you know.

Mac OS X Yosemite (version 10.10) is the eighth major release of Mac OS X (now named macOS), Apple’s desktop and server operating system for Macintosh computers. 6 Download OS X EL Capitan OS X El Capitan (version 10.11) is the twelfth major release of OS X (now named macOS), Apple Inc.’s desktop and server operating system for Macintosh.

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 OS X, so make sure that you have a reliable Internet connection. If you're using a Mac notebook computer, plug it into AC power.

Download OS X Yosemite

Mac Os X Yosemite Install Dvd Download

For the strongest security and latest features, find out whether you can upgrade to macOS Catalina, the latest version of macOS.

If you still need OS X Yosemite, use this link: Download OS X Yosemite. A file named InstallMacOSX.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 InstallMacOSX.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 OS X Yosemite.

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 OS X and related updates to your Mac firmware.

Learn more

• OS X Yosemite 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.

Apple announced OS X Yosemite on June 2, 2014, a powerful new version of OS X redesigned and refined with a fresh, modern look, powerful new apps and amazing new continuity features that make working across your Mac and iOS devices more fluid than ever.

The new Today view in Notification Center gives you a quick look at everything you need to know, all in one place; iCloud Drive is located within the Finder and can store files of any type; and Safari has a new streamlined design that puts the most important controls at your fingertips.

Mail makes editing and sending attachments easier than ever; Handoff lets you start an activity on one device and pass it to the other; and Instant Hotspot makes using your iPhone’s hotspot as easy as connecting to a Wi-Fi network. Yosemite even gives you the ability to make iPhone calls on your Mac.

“Yosemite is the future of OS X with its incredible new design and amazing new apps, all engineered to work beautifully with iOS,” said Craig Federighi, Apple’s senior vice president of Software Engineering.

“We engineer our platforms, services and devices together, so we are able to create a seamless experience for our users across all our products that is unparalleled in the industry. It’s something only Apple can deliver.”

With Yosemite, OS X has been redesigned and refined with a fresh modern look where controls are clearer, smarter and easier to understand, and streamlined toolbars put the focus on your content without compromising functionality.

Translucent elements reveal additional content in your app window, provide a hint at what’s hidden behind and take on the look of your desktop. App icons have a clean, consistent design and an updated system font improves readability.

New Features:

Today view in Notification

The new Today view in Notification Center gives you a quick look at everything you need to know with widgets for Calendar, Weather, Stocks, Reminders, World Clock and social networks.

You can even download additional widgets from the Mac App Store to customize your Today view. Spotlight now appears front and center on your desktop and adds new categories of results, so you can view rich suggestions from Wikipedia, Maps, Bing, App Store, iTunes Store, iBooks Store, top websites, news and movie showtimes.

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Built right into the Finder, iCloud Drive stores files of any type in iCloud. iCloud Drive works like any other folder on your Mac, so you can drag documents into it, organize them with folders and Tags and search for them using Spotlight.

With iCloud Drive, you can access all your files in iCloud from your Mac, iPhone, iPad or even a Windows PC.

Safari

Safari has a new streamlined design that puts the most important controls at your fingertips. A new Favorites view gives you quick access to your favorite websites, and a powerful new Tabs view displays thumbnails of all your open web pages in one window.

Safari also gives you more control over your privacy, with separate Private Browsing windows and built-in support for DuckDuckGo, a search engine that doesn’t track users.

When you search for popular or common terms, new Spotlight Suggestions appear along with the suggestions from your search provider. Safari supports the latest web standards, including WebGL and SPDY, and with support for HTML5 Premium Video Extensions, you can watch Netflix HD videos for up to two hours longer.

Powered by the Nitro JavaScript engine, Safari is over six times faster than Firefox and over five times faster than Chrome when executing JavaScript found in typical websites.

Mail

Mail makes editing and sending attachments easier than ever. With Markup, you can quickly fill out and sign forms and even annotate images and PDFs from within Mail. Mail Drop allows you to easily send large videos, images or files up to 5GB from the Mail app to any email address.

Messages has a new look and delivers even more options for communicating with friends and family.

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Now you can add titles to ongoing message threads so they are easy to find, add new contacts to ongoing conversations, or leave those conversations you no longer want to follow. With Soundbites, you can create, send and listen to audio clips right in Messages.

Continuity

Continuity features in Yosemite make your Mac and iOS device perfect companions. When your iPhone or iPad is near your Mac, Handoff lets you start an activity on one device and pass it to the other. Instant Hotspot makes using your iPhone’s hotspot as easy as connecting to a Wi-Fi network.

Now the SMS and MMS messages that previously only appeared on your iPhone appear in Messages on all your devices. You can even send SMS or MMS messages directly from your Mac and make or receive iPhone calls using your Mac as a speakerphone.

Technologies

Yosemite delivers platform technologies that make it easier for developers to create amazing new Mac apps. SpriteKit makes it easier to incorporate realistic motion, physics, and lighting in games and integrates with SceneKit to bring 3D casual gaming within reach of any developer.

Storyboards for Yosemite and Xcode 6 take advantage of the new View Controller APIs in AppKit to make it easier to build apps that navigate between multiple views of data.

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New APIs allow developers to integrate Handoff into their own apps and create Today view widgets for distribution through the Mac App Store. Share Menu extensions add new destinations to the Share Menu, and new APIs let developers create custom Share Sheets.

Download OS X Yosemite

Mac Os X Yosemite Installer Downloads

This is an Official OS X Yosemite Installer from Apple, It can be used to ReInstall or Upgrade OS X Yosemite on a Mac.

Mac Os X Yosemite Installer Download Windows

If you are looking to Install Yosemite on PC view Hackintosh Yosemite Guide.