My son gave me a quite nice Macbook. Says it has Leopard OS, notice when updating, says it's OS X, can I upgrade to Lion, and should I ? How do I find out what RAM it has, what the cpu is, (I did notice it has nearly 300gb of Hard disc space) Also, I have a Dell laser printer. Now, my other printer, a Canon, installed no problems because it had a Mac disc. No such luck with the Dell laser. I downloaded the required installer, installed it, expecting it to open up.....but it didn't. And I haven't a clue where it is. How do I get to it to install a network printer when the installer is needed from the net ? Just got this half an hour ago, and realizing just how different they are !!!!