Circuit Schematic Software

Can anyone recommend a free schematic drawing tool for Macs?

I want to be able to simulate circuits on my mac and not pay for the software. Anyone want to tell me their favorite program(s) that fit(s) these criteria?

You should take a look at MacSpice 3f5

http://www.macspice.com/

or

Quite Universal Circuit Simulator 0.0.15 for Mac

http://download.cnet.com/Quite-Universal-Circuit-Simulator/3000-2053_4-48316.html

Circuit Analysis Modeling: PSPICE – ORCAD Simulation and Tutorial (Voltage Divider)