VVI (http://www.vvi.com) has released DAQ Plot 10.6.4 for Mac OS X. The upgrade includes some bug fixes.
The US$59.96 eight strip chart recorder includes software and hardware and measures voltages from sensors and presents them in a strip chart format. It plots electrical signals and controls devices in realtime using digital output channels and built-in feedback control loops. With DAQ Plot you can control other hardware such as valves and switches using the digital output connectors and their associated user interface switches.
It also has built-in feedback loops so you can control processes based on input values. The effect of the feedback and control switch settings are immediately viewed on the real-time strip chart so you can monitor and assure your process as it happens.