Folseti 1.1 for Mac can be downloaded from our website for free. Folseti for Mac is included in System Tools.
From the developer:
Two simple shell scripts for starting the Seti and Folding command line clients with some instructions on configuring them.
You may want to check out more software for Mac, such as Open.nuke folder, Butterflyzer or FileVaporizer, which might be similar to Folseti.