qcOSC
qcOSC is a plug-in for Quartz Composer for receiving Open Sound Control messages using the UDP protocol.

Description
The plug-in was created because there seems to be a problem with the built-in OSC receiver in QC in that it sometimes outputs 0’s instead of the last received numeric value, causing something best described as “stuttering” when used for visual output. Additionally the plug-in automatically creates its outlets when receiving messages and advertises its input port via Zeroconf (otherwise know as Bonjour in Apple-land).
Installation
Put the plug-in file (qcOSC.plugin) in either
~/Library/Graphics/Quartz Composer Plug-Ins
or
/Library/Graphics/Quartz Composer Plug-Ins
Usage
Drag a qcOSC instance into your composition, open the “Patch Inspector” go to Settings and enter a Port number for the plugin to listen on. Send OSC messages. Enjoy.
Download
qcOSC-v0.5.zip – OS X 10.5/10.6 Universal Binary