I have read through the FAQ and the manual, and have seen nothing regarding the use of the program on a Macintosh. I downloaded the file and it came up naturally as an .exe file. Is there a way to either A) get a Macintosh/Apple friendly version or B) convert the .exe into a .zip or something that I can use, or C) will I just have to suffer?

Any help regarding this would be greatly appreciated. If I don't need to waste my time on a program that won't work, then I'd love to know!

The Clean Installer will not work for Mac. However, there is a program under development known as Woo-Hoo which acts as a sims2pack installer and package editor. It is no longer available at this site, but you can read about it here:
http://www.modthesims2.com/showthread.php?t=161483
And the creator Igiese has set up a new site where you can request a copy of the program:
http://woohooformac.wordpress.com/
I'm sure he would appreciate any feedback too, if you want to try it out.
Also, we have a Mac forum here with a sticky thread where I give out information about programs such as Woo-Hoo:
http://www.modthesims2.com/forumdisplay.php?f=443
http://www.modthesims2.com/showthread.php?t=75968

Thank you!