Reminders. Now nothing slips your mind.

Organise your life on your Mac. It’s all in a list. More than one, in fact. Make as many lists as you need and easily add to them. Set deadlines and you’ll get alerts as they approach. Set a location from your Mac, and your iPhone or iPad will remind you when you get there.2 Tick items off your lists as you go, and keep track of what you’ve completed. iCloud keeps your reminders up to date on your Mac, iPad, iPhone and iPod touch, so you don't forget anything.

Notes. Not one thought lost.

Notes is designed for whatever’s on your mind, wherever you happen to be. Think it up. Jot it down. Make it even more noteworthy with photos, images and attachments. You can add, delete and flip through your notes, or do a quick search. Use the Share button to send your notes with Mail or Messages. Pin important notes to your desktop so they’re easy to get to. And take them with you everywhere. Notes works with iCloud, so when you create or edit a note on your Mac, it automatically updates on your iPhone, iPad and iPod touch. And vice versa.

Power Nap. Mac stays up to date, even while it sleeps.

When your Mac goes to sleep, it still gets things done with Power Nap.3 It periodically updates Mail, Contacts, Calendar, Reminders, Notes, Photo Stream, Find My Mac and Documents in the Cloud. When your Mac is connected to a power source, it downloads software updates and makes backups with Time Machine. While all that updating is going on, the system sounds are silent and no lights or fans come on, so nothing disturbs you. And when your Mac wakes up, it’s ready to go.

Sharing. Share straight from here.

You’ll find the Share button throughout OS X Mountain Lion. It’s the new, easy way to share straight from the app you’re using. Share photos, videos and other files with Mail, Messages and AirDrop. Send links from Safari. And with a few clicks, post straight to Facebook, Twitter, Flickr or Vimeo when the moment strikes.

Twitter. Tweet straight from your apps.

OS X Mountain Lion is designed for tweeting. Sign in once and you’re all set up — and you don’t have to leave the app you’re in. Tweet links and photos directly from Safari, iPhoto or Photo Booth with the new Tweet sheet. Add comments and locations. And when someone mentions you in a tweet or sends you a direct message, you’ll get a notification right there and then. You can tweet from Notification Center too.

Gatekeeper. Downloading apps is safer than ever.

Gatekeeper helps protect you from downloading and installing malicious software on your Mac, no matter where your apps come from. And it gives you even more control over which apps you install. You can download and install apps from anywhere on the web, just as you always could. You can choose to download and install apps from the Mac App Store — the safest place to find apps for your Mac. Or use the Gatekeeper default option, which allows you to install apps from the Mac App Store and apps from identified developers. It’s a new way OS X keeps your Mac safe.

All-new features for China.

OS X Mountain Lion brings all-new support for many popular Chinese features and services. The new Chinese dictionary and improved text input make typing in Chinese easier, faster and more accurate. With eight new fonts, your writing can appear formal, informal or fun. Mail works with QQ, 163 and 126. Baidu, the leading Chinese search provider, is a built-in option in Safari. Now you can post to the web straight from the app you’re in. Post videos with Youku and Tudou. Post to Sina Weibo, the popular microblogging service. And share easier than ever. All these new services are easy to set up on your Mac.

  1. iCloud requires iOS 5 or later on iPhone 3GS or later, iPod touch (3rd generation or later), iPad or iPad mini; a Mac computer with OS X Lion or later; or a PC with Windows Vista, Windows 7 or Windows 8 (Outlook 2007 or 2010 or an up-to-date browser is required for accessing email, contacts and calendars). Some features require iOS 6 and OS X Mountain Lion. Some features require a Wi-Fi connection. Some features are not available in all countries. Access to some services is limited to 10 devices.
  2. Location-based reminders on iPad require iOS 6.
  3. Power Nap requires a Mac notebook with built-in flash storage. May require a firmware update.
  4. Game Center is available on iPad, iPhone 3GS or later, iPod touch (3rd generation and later) and Mac computers with OS X Mountain Lion. Game Center works with games that have been developed to work with the Game Center service. Game Center may not be available in all countries or regions, and the available games may vary by country or region.
  5. iCloud Tabs on iPhone, iPad and iPod touch requires iOS 6.
  6. Testing conducted by Apple in June 2012 using SunSpider 0.9.1 JavaScript performance benchmark on a 21.5-inch iMac 2.7GHz Intel Core i5 system with 4GB of RAM. Pre-release Safari 6.0, Chrome 19.0.1084.54 and Firefox 13.0 tested on pre-release OS X v10.8. Internet Explorer 9.0.8112.16421 tested on Windows 7 Ultimate SP1 (64-bit). Performance will vary based on system configuration, network connection and other factors.