It runs slow on leopard, come on everyone report this bug to the blender development team!
I read it was because Blender isa 32 bit app while Leopard is a 64 bit OS, making things that arent compiled for a 64 bit OS slow and sluggish

There is a 64 bit build of Blender, but that would only make a difference if A) you are on a 64-bit chip (new iMac, MacBook Pro or Mac Pro), and B) if Apple has screwed the 32-bit support (which is not the case). Blender runs beautifully for me on a first-generation MacBook Pro, running Leopard. Try running software update, or throwing out 3rd-party GUI extensions (in particular, blender runs badly with MightyMouse).