//隐藏

defaults write com.apple.finder CreateDesktop -bool FALSE;killall Finder

//显示

defaults delete com.apple.finder CreateDesktop;killall Finder

实用工具-AppleScript编辑器

display dialog "桌面图标设置为可见或隐藏?" buttons {"可见", "隐藏"} with icon 2 with title "Switch to presentation mode" default button 1
set switch to button returned of result
if switch is "隐藏" then
	do shell script "defaults write com.apple.finder CreateDesktop -bool FALSE;killall Finder"
else
	do shell script "defaults delete com.apple.finder CreateDesktop;killall Finder"
end if

显示隐藏文件/文件夹

//显示
defaults write com.apple.finder AppleShowAllFiles -boolean true ; killall Finder

//隐藏
defaults write com.apple.finder AppleShowAllFiles -boolean false ; killall Finder

 //OS X Mountain Lion 
 defaults write com.apple.finder AppleShowAllFiles TRUE ; killall Finder
 defaults write com.apple.finder AppleShowAllFiles FALSE ; killall Finder

shell脚本

STATUS=`defaults read com.apple.finder AppleShowAllFiles` 
if [ $STATUS == YES ]; 
then 
defaults write com.apple.finder AppleShowAllFiles NO 
else 
defaults write com.apple.finder AppleShowAllFiles YES 
fi 
killall Finderß