Portable Audacity OS X is the Audacity audio editor packaged as portable application so you can carry around with you on any portable device, USB thumb drive, iPod, portable hard drive, memory card, other portable device(also on your internal hard disk) as long as it has 12 MB of free space and use it on any Mac OS X computer, taking your preferences with you. It works on Mac OS X 10.4.2 or later.