To be even safer, download and run apps from the Mac App Store and apps with a Developer ID or download and run only apps from the Mac App Store - the safest setting of all. You can download and run applications from anywhere, just as in OS X Lion. Now you can choose from three security options. And it gives you control over which applications to download and run on your Mac.

Gatekeeper- Makes the Mac safer than ever by helping to prevent users from unknowingly downloading and installing malicious software.

AirPlay Mirroring - Now, just like on iOS you will be able to wirelessly mirror your Mac to your Apple TV.

With Game Center you will be able to see what your friends are doing, check your stats, and more just like you have iOS.

Game Center - One of the most important add-ons is Game Center.

Also when you get a mention or a direct message, a Twitter notification appears on your desktop. You will be able to tweet right from your apps.

Twitter - OS X 10.8 will also have enhanced Twitter capability.

Just look for the sharing icon on some apps to show a send to.

Share Sheets - Now OS X will have the useful share Sheets.

It will even have a Gesture that will pull up the Notification Center just like on iOS 5, which is done by swiping two fingers to the left. It will have notifications about your Mac and Mac Apps, along with your other iDevices that have iCloud set up.

Notification Center - OS X Mountain Lion will also have the Notification Center.

You can also create a note and cut it out and place it on your desktop just like Sticky Notes from Windows 7.

It will use iCloud to sync your notes to all your devices. It will use iCloud to sync reminders to all your devices.

It will pop up reminders at you from both your Mac and other iDevices.

Reminders - Mountain Lion will feature Reminders.

You will be able to send and receive messages for free from your Mac.

Messages - Mountain Lion will bring the popular iMessage feature from the iPhone, iPad, and iPod Touch to Mac.

It will be using it for iMessages, Reminders, Game Center, Mail, Notes, and many other features.

iCloud - Mountain Lion plans to fully embrace the abilities of iCloud.

It still uses the Aqua user interface, as well as the steel window color. The appearance of Mountain Lion is mostly unchanged from Lion (10.7) and Snow Leopard (10.6).

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