Tardis:Spell checking with a Mac

It's easy to set up your Mac to spell check in British English. This is important to do while editing this site, because British English is required.

OS version information
The following tutorial applies to OS X Lion (10.7), but the fundamentals have been present in the OS X structure for a while. Some very slight modification of this tutorial will help you spell check in British English regardless of your OS X flavour.

Changing your dictionary
All OS X installations carry with them a vast array of dictionary applications. Changing from your default local English dictionary to the Oxford English Dictionary is a snap. Note that the British English dictionary in Mac OS X is not the "official" dictionary of this wiki. We've not yet decided on a definitive dictionary. The OS X dictionary will, for example, tell you that colonise and dematerialise are valid alternates for what appears to be the primary spellings of colonize and dematerialize. Because Mac British spell checking flags colonize as incorrect, however, this wiki deems colonise to be the "practically correct" spelling. For more of these "close calls", please see our spelling cheat card. The technically minded may wish to seek out the full list of words whose spelling we enforce.
 * 1) Go to your Applications folder
 * 2) Open the app named "Dictionary"
 * 3) Type  to open up Preferences
 * 4) Scan through the list of resources and put them in the order you want. To turn on the British Dictionary and Thesaurus to the exclusion of your defaults, pull the British resources to the top of the list, select them, then deselect your defaults.  Now, when you open up Dictionary and search for a word, you'll get the British spelling.  Helpfully, if you enter an American spelling, it'll still find the word, but simply tell you that you've used an American spelling.