By default in OS X, users are given a warning when emptying the Trash and removing files from the hard drive. You can disable the warning window before emptying the Trash with following command:
10.6
Disable window animations in OS X Finder
Disable all window animations and the animation when opening the info window in Finder. Use the following OS X Terminal command:
Copy & Paste only the Email address in OS X Mail
When copying an email address from OS X Mail application and paste it somewhere in Mac OS X, you get the contacts fullname as well as their email address (“Tim Cook
Change auto check interval Google Notifier
When you use Google Notifier you will have noticed that your mailbox will be checked once every 15 minutes. You can change this interval with the following Terminal command.
Disable Google Chrome’s automatic software update
Google Chrome automatically checks for software updates in the background. If you want to disable the automatic updates to reduce data traffic, you can do this with a defaults write command.
Display the Cover Flow frame rate
The following command will show the cover flow frame rate (as frames per second) within the Finder alongside each filename when flipping through files.
Disable ‘Eject’ menu option in OS X Finder
Disable the menu option: ‘File ▸ Eject [volume]’ (cmd⌘ + E) in the Mac OS X Finder menubar.