Is it possible to get assistance without attitude? This is getting fun...aren't we all downloading music/programs/etc. basically for free? no royalties for anyone? So lookup "Hypocrite" again next time you chastise someone looking for answers... My area of expertise is in creativity. Lightwave, Maya, director, photoshop, illustrator, premiere, after effects, quark and sound edit. It's really not a big deal about downloading Mac OS 10, just wanted to know if I needed it to be able to utilize the LimeWire Pro version I gave my $18 bucks for. I really don't see any difference between the free version and the Pro from LimeWire. So calm all your unutilized testosterone down and just be cool, & (we don't call people "girl" in this country frenchie).