It’s possible to place OS X Dock in the left or right side corner of the screen with this hidden defaults write command. After applying the command you should restart the Dock. Use one of the following commands:
10.8
Disable the send-mail tone in OS X Mail application
When sending an e-mail in the standard OS X Mail application a swoosh tone will be played. This tone cannot be disabled through the standard mail settings. With the following defaults write command you can disable the sound.
Launchpad: Change the level of background blur
Launchpad uses a blurred version of your Desktop image as its background. Using cmd + option + ctrl + B while in Launchpad cycles through the original image, the blurred one, a black and white version and a blurred black and white version.
With the following defaults write command you can adjust the blur radius:
Stop Safari creating favicon caches
Safari stores favicons in a database named ‘WebpageIcons.db’ located in the folder: ~/Library/Safari/Icons. It is possible to disable the creation of this database with the following command:
Mission Control: Fullsize window previews
In OS X Lion the thumbnail previews of windows from the same app are grouped together. By hovering the mouse over these thumbnails and scrolling up, you can expand the group of windows. It is possible to display these windows in full size.
Activate element inspector in the Mac App store
In the Mac App Store is a hidden element inspector available that lets you view the source of any page or element. It is possible to extract text or images, and adding your own code through the console option.
Enable spring loaded Dock items
Spring-loaded Dock items are supposed to save you time by allowing you to drag a file over the folder/icon. Hover it for a few seconds and the application/folder will open. Use the following command to enable these feature: