
- Download Link
- Official Homepage
- Complete Features List
- How to Upgrade
- John Siracusa (Ars Technica) Review

Headline Features:
- Design: Yosemite's headline feature is an overhauled design, inspired by iOS 7, while still maintaing the feel of the traditional desktop.
- Notification Center: A new Notification Center gives easy access to upcoming events, reminders, weather, and more. Developers can extend this further with widgets from the Mac App Store.
- Spotlight: A brand new Spotlight search provides a larger window for your search results. In addition to finding things on your Mac, Spotlight now searches the web (like Wikipedia), Maps, and other sources.
- Continuity: A new feature called Continuity connects your Mac and iOS device in a number of new ways, allowing you to make and receive phone calls from your Mac, send and receive text messages on your Mac, continue your work between devices with Handoff, and create an instant hotspot (from your iPhone’s cellular connection) right from your Mac.
Other Notable Features:
- AirDrop with iOS: AirDrop now works between Mac and iOS.
- Full screen button: The green button now takes the app full screen, eliminating the need for an extra full-screen button in the toolbar.
- Batch rename: Quickly rename a set of files in the Finder. Select the files and choose Rename. You can also add custom text and numbers to each filename.
- Mail Drop: With Mail Drop, you can send messages of up to 5GB.
- Messages: Mute or leave conversations, see all attachments, send soundbites, and share your screen
- Peer to peer AirPlay: Peer-to-peer AirPlay in OS X Yosemite lets visitors to your home or office quickly and easily connect their Mac or iOS device to your Apple TV without using passwords or connecting to the Wi-Fi network.
- iCloud Drive: Store any file in iCloud and access it from your Mac, iPhone, iPad, or even a Windows PC.
- Longer Netflix playback: With energy-efficient native video playback for Netflix, Safari lets you watch Netflix videos for up to three hours longer than before.
- Close tabs on other devices: In [Safari] Tab view, you can close tabs that are open on another device.
- Unit conversion: Spotlight now lets you convert units of measure, currency, and more, right from the search field.
- Log in with Apple ID: You can use your Apple ID to log in to your Mac, so you only have to remember one password.
- Updated system sounds: Many of the system sounds have been updated in OS X Yosemite so they sound clearer.
- New system font: OS X Yosemite has a modern, easy-to-read font throughout the system that looks great on a Retina display.

General Requirements:
- OS X 10.6.8 or later
- 2GB of memory
- 8GB of available space
Supported Models:
- iMac (Mid 2007 or newer)
- MacBook (Late 2008 Aluminum, or Early 2009 or newer)
- MacBook Pro (Mid/Late 2007 or newer)
- MacBook Air (Late 2008 or newer)
- Mac Mini (Early 2009 or newer)
- Mac Pro (Early 2008 or newer)
- Xserve (Early 2009)
Handoff and Instant Hotspot support:
- MacBook Air (2012 or newer)
- MacBook Pro (2012 or newer)
- iMac (2012 or newer)
- Mac mini (2012 or newer)
- Mac Pro (Late 2013)
If you're having trouble with Continuity: http://support.apple.com/kb/TS5458