RioVista is a small OS X native (ObjC Cocoa) tool to allow you to upload .ani files to the Rio500 - giving the Rio500 cool animation splash screens on startup.
The source code for RioVista is also available. Please email me.
RioVista does not allow you to download music. Use iTunes for this. iTunes grabs the channel to the Rio500 so it cannot be running alongside RioVista or RioVista will not find the Rio500.
I am no longer working on RioVista
Download: RioVista
Useful websites: RioWorld (for .ani files)