Download of XSTab 2.0 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. XSTab for Mac is included in Audio & Video Tools. This free software for Mac OS X was originally produced by Matthias Hofmann.
From the developer:
XSTab is a tool designed to assist guitar players to find out what is really played in an audio file focusing on classical guitar music pieces. Based on WAV-audio files, XSTab generates guitar tabs and provides many filters to optimize and simplify these tabs to your needs.
You may want to check out more software for Mac, such as iCDc, 4Media Video Converter Standard or Xilisoft iPhone Video Converter, which might be related to XSTab.