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Mac are Awesome

You can preview any file (even Photoshop files and videos) by selecting it and pressing the spacebar. Press it again to close the preview. While in the preview you can also press the arrow keys to change between files.

Summarize text

Mac OS X allows you to quickly summarize long pieces of text in just a few seconds. To summarize a text first select it, right click on the selection and click on “Summarize”. To enable the summary feature, click on the app name in the status bar (“Chrome” for instance) > Services > Services Preferences… > scroll down and check “Summarize”.

Hot Corners

Hot corners allow you to trigger certain events by touching a corner of your screen. You can start and disable a screensaver, open mission control, application windows, show the desktop, dashboard, notification center or lauchpad or put your display to sleep.

Automate actions

Everyone forgets about Automator, the application that lets you automate repetitive tasks. It works by clicking together actions into a chain of events.