Latest Stable Version: Vole 1.6.20
What is Vole?
Vole is an off-line reader for CIX Forums. It runs on MacOS X Lion and later versions. Compatibility
What is CIX Forums?
See the overview here
A somewhat out-of-date Wikipedia article here.
Sign up for Cix here. It's free to access up to 10 forums.
More at their Accessing CIX Page.
Scroll down to the Vole section. You could also use the CIXReader client for macOS.
How to get Vole
Once you have signed up for CIX Forums, access it using your web browser. Join the vienna forum and read the files topic where there will be a message informing you how to get the latest Vole.
Frequently Asked Questions from the Vole App Help