The 1.0 version of Cabernet for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. The program lies within Developer Tools, more precisely Webmaster Tools.
From the developer:
Cabernet is a minimalistic theme that focuses on small precise detail to create an extremely organized and animated experience for users.
The theme offers great flexibility within its design so users can easily customize the look to create a very unique experience of the theme - there are virtually thousands of possible combinations.
Takes advantage of jQuery tabs for the most effective use of small spaces.
You may want to check out more software for Mac, such as The Colors Of The Rainbow or silex, which might be similar to Cabernet.