Is there a CCleaner available for this older os?
Hi westteach, and welcome to the forum.
I'm afraid there doesn't appear to be one.
Requires an Apple Mac running OSX 10.5 to 10.7 Lion
http://www.piriform.com/mac/ccleaner
CCleaner for Mac is still relatively new, and I have no idea as to whether the versions available would be OK with an older Mac operating system.
Maybe the devs or one of the members owning a Mac may contribute to the topic and clear that one up.