Unlock Mac OS X apps' hidden features

The best of the rest

Other Apple applications offer the odd useful 'tweakable' setting. Here are our favourites:

If you're fed up with HTML emails, the above command over-rides such things and takes you on a trip back to the 1990s. (If after applying this you can't access attachments in an HTML email, either use Quick Look to access them, or use View > Message > Next Alternative or Command+Option+].)

STRIPE-FREE: A quick trip to Terminal can remove the stripes from Finder's list view

14. Make Help Viewer less hateful

defaults write com.apple.helpviewer NormalWindow -boolean yes

It'd take more than the above command to make us love Help Viewer, but this at least stops it from floating above other apps, laughing maniacally as it blocks everything else from view.