Portable Audacity 1.3.3 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The software lies within Audio & Video Tools, more precisely Editors & Converters.
We recommend checking the downloaded files with any free antivirus. The following version: 1.3 is the most frequently downloaded one by the program users. The actual developer of this free software for Mac is FreeSMUG. Commonly, this program's installer has the following filename: portableaudacity-osx-ub-1.dmg.
From the developer:
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.
You may want to check out more Mac applications, such as Audacity, Portable AbiWord or Portable RSSOwl, which might be related to Portable Audacity.