I bought a product that use of Adobe Air and says it should work with my Mac OS 10.4.11. The Adobe Air website says the latest version of Adobe Air is not supported with that OS and refers me to the archived older versions, with no indication that I can see as to which one is a workable version for my computer.
Big question is: Are you on a PPC mac or Intel?
PPC or Intel is irrelevant from what I've found.
Mac OS 10.5 is the minumin to run AIR
Adobe has Air 1.5.3 http://helpx.adobe.com/air/kb/archived-air-sdk-version.html But there is no support for PPC or 10.4 mentioned.