Is there anyway I can download an older version of Origin for Mac?

Usually when there is an update to Origin it's because the game has been updated also and the old version will not work anymore. I'm guessing your mac has a powerpc cpu? If that's the case I'm guessing Origin only supports the X86. Your OS X dates back to Aug 5, 2009. Origin for the Mac is fairly new and I'm guessing it's X86 only.