Hi I ported SystemProfiler from OpenQwaq to Pharo [1]. It's supposed to be better than MessageTally, not share some of it's limitations and show primites quite accurately. It requires Cog. Please note that this software is GPLv2. I left the class category as Qwaq, I hope this is fine with everybody. [1] http://www.squeaksource.com/SystemProfilerPharo.html Cheers Philippe