To compare Linux with MacOS (or Windows) you should buy also a computer MADE to run Linux. Please, go ahead and install MacOS (or Windows) in a bunch of HP Proliants or in a Sun Blade. How about in a Compaq nc6300? OK, you probably like better a Thinkpad X1. Maybe in your Netbook? How about in that old P3 you have at the basement collecting dust? Even better, why don't you install Lion on your old PPC iMac? Well, I have Linux running in ALL of those computers and ALL of them work pretty much "out-of-the-box".