OSX keyboard macros

OSX doesn't exactly come with keyboard macros, but it's not difficult to create them.  First, write an AppleScript that simply writes keystrokes to "System Events":

Save it to your "Library/Scripts" folder.

Then, add the key mapping you want to "System Preferences, Keyboard, Keyboard Shortcuts, Application Shortcuts".  Click the '+' to add one, use the name of the script you created, and choose a shortcut.  If you want to change the shortcut later, double click right over the characters for the shortcut.

I used this to create a shortcut when editing an html pre element, so it looks similar to http://formatmysourcecode.blogspot.com/