I'll be buying a used 4,1 or 5,1 Mac Pro soon, probably on eBay. I'll make sure the Mac originally shipped prior to June 2011 so that it can run Snow Leopard, as I need to run PowerPC software. Most of these Macs unfortunately don't come with the original gray Mac OS X & Applications installer DVDs that they originally shipped with. Assuming I buy a Mac without these discs, my plan was to buy a retail 10.6 DVD and use that to format the hard drive & install Snow Leopard before updating to 10.6.8. 2 things occurred to me. Firstly, presumably if I do this, I'll be without whatever is installed from the gray "Applications" DVD. I'm guessing that iLife is what's on the "Applications" DVD, and everything else (e.g. Safari, Preview, TextEdit, etc.) is on the "OS X" DVD. If this is the case, then fine, as I don't need iLife. Or is it more complex than that? Can anyone tell me what precisely is & isn't on the "Applications" DVD as opposed to the "OS X" one? Secondly, the vast majority of the retail Snow Leopard DVDs for sale on eBay seem to be for 10.6.3. However, according to a sentence about a third of the way into this post: http://forums.macrumors.com/showpost.php?p=16164287&postcount=8 "you need 10.6.4 to install on 2010 Mac Pros. 10.6.3 and lower (check your DVD) won't install." If this is correct, and I buy a 5,1 then a 10.6.3 retail DVD will be no use to me, and I'll have to find a 10.6.4 or newer retail DVD. The problem is, I'm not sure such a thing ever existed. Can anyone verify this? Has anyone bought a retail Snow Leopard DVD which came with 10.6.4 or newer? Many thanks.