I have recently discovered a great program (I think it must be new) that allows drawing your personal electrical diagram using an Apple Mac OSX. EazyDraw
You have a choice of the FREE version which limits the number of objects placed.... but you can get a feel for the program....or
$20 - 9 month version - Full version use for 9 months. This version allows most builders to get the job done relatively quickly and not pay for yet another piece of software they are going to use once.
The full version is $95.
I opted for the 9 month version and also picked up the additional library package for a total of $30. The library packages include all sorts of technical and drawing libraries. You can check them out on the EazyDraw homepage.
EazyDraw is a very powerful program but for guys like me that want something simple and quick it also accommodates us.
Check it out at: http://www.eazydraw.com/index.htm
For those who are interested, I am modeling the Z-11 generic light aircraft diagram from AeroElectric and making my changes as necessary. I started using just a pencil and paper but any changes resulted in "eraser dust" and a crappy looking diagram. Changes in the EazyDraw diagram are simple and quick and the program doesn't require you to be a CAD engineer to figure out.
Output can be any number of options including pdf. You can check out my "work in progress" at the following link: http://files.me.com/glpalinkas/dr3box
It will download a pdf of what I have done so far (in just a few hours).
If anyone is interested in the complete EazyDraw file (and you are buying the application) and are basing their RV build on AeroElectric Z-11 I can supply the file to them, so they don't have to reinvent the wheel. Just drop me a pm.