Mac OS X

Change File Permissions using Terminal in Mac OS X
Safe Sleep Mode for Mac OS X
Make Your Handbrake Rips Faster
Rediscover Your Music Using Smart Playlists

Mac Development with Xcode

How To use Dynamic Libraries in Xcode 3.1 (using FMOD)
How To Add (Java) Packages to Xcode

Design

Brushed Metal Textures in Photoshop - 17MB (Video download)