An Automator/Apple-script to use 'Lucida Grande' as system font on OS X Yosemite. See http://forums.macrumors.com/showthread.php?t=1768362#22 for detail. Font patch created by vista980622, http://forums.macrumors.com/member.php?u=724241
Tested on OS X Yosemite Public Beta 2 and its public update "Developer Preview 7 (14A361p)"