Mac OS X: Disable autocorrect in commit messages

Mac OS X automatically “corrects” what it deems to be spelling mistakes in commit messages in source control applications such as Versions, Tower, GitHub, etc. Because commit messages often contain non-standard text, autocorrect often changes legitimate input, for example dist becomes diet.

To disable autocorrect, simply right-click in the commit message text area, and under “Spelling and Grammar” disable “Correct Spelling Automatically”.