The commands are as follows: defaults write com.apple.dock single-app -bool true then type: killall Dock To change it back to the way it previously was, change "true" to "false" Become a Fan on Facebook - http://trdd.us/fb Follow me on Ping - http://trdd.us/ping Follow me on Twitter - http://trdd.us/twitter Follow me on DailyBooth - http://trdd.us/db Friend me on Game Center - Snazzy Friend me on Xbox Live - Quinn One (friends list is full)