Hi guys. Today I got my very first mac from a friend of mine who didn't need it anymore. And I have been playing with it all day long. I've been very excited, which led to an extreme urge of upgrading this awesome computer, so that I can use it just like my other PCs, that are much more powerful than this. From looking around a bit on the desktop, this is an iMac G3 333 tray loading edition. My question is up to what spec can I upgrade it with hardware that are available in today's market. OS: Comes with 8.6. What is the latest OS X I can put in it without compromizing the performance? I don't have any recovery CD or any other CD with it. I think my friend lost em. RAM: max what amount of ram can I put in it? what should I ask for when I go to the hardware store? HDD: people are saying that this mac can take less than 8gb hdd without any complication. so I may get a hdd of that size. what else can I upgrade for not much money?