Disable auto-correct in Apple Lion
By default, Mac OS 10.7 (Lion) and 10.8 (Mountain Lion) come with a new auto-correct feature that attempts to correct typos and misspelled words on the fly. If you find this annoying, it’s an easy feature to disable.
- Open System Preferences (go to the Apple menu in the top left corner of your screen)
- Choose Language & Text
- Click on the “Text” tab and uncheck the box next to “Correct spelling automatically”