If you have problems with HTML emails received in OS X Mail, you can force the Mail app to display e-mails in plain text using the following defaults write command.
10.7
Disable CD/DVD media burning in OS X Finder
You can prevent users from burning CD/DVD media on your Mac. Enabling this command will result in the following message when trying to burn a CD or DVD: “The operation can’t be completed because you don’t have the necessary permission”.
Disable launchpad fade effects
Launchpad shows a fade effect anytime it is opened or closed. If you want to access Launchpad a little bit faster, it’s possible to disable the fade effects. Use the following Terminal commands:
Disable the warning before emptying the Trash
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:
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
Enable iTunes notifications in the Dock
The iTunes Dock icon can be set to display a “Now Playing” song and artist pop-up that transitions in and out and music starts. Use the following Command: