All over Apple discussions there are may disgruntled Mac Users, used to the veracity of the "Mac Platform,' having minimal interest in iOSx!
I have been using L/ML/Mavs on FW running SL internal, my preference. Mavs is 'nice?' It integrates all that Gen ? wants, indoctrinated to text to each other at parties instead on conversing. BUT sells!
Accidently I came here -- many other threads are relevant.
IMHO: providing your Mac is based on Sandy Bridge an 'upgrade' Snow Leopard (faster only?) is viable as dedicated posters here have verified.
If your Mac is Ivy-Bridge or Haswell it will not work, IMHO. Hardware changes.
I find it amazing that 100,000 users requiring Rosetta and at $50/payment for it has been not thought of by Apple. Maybe just, 'Tea-money?' I do not know.
But, again, IMHO, if getting a 2011 Mac Mini to work at some 3 times the speed using Snow Leopard, there is something wrong with Lion et-alia, apart from dropping Rosetta?
By doing the things that many people have done herein it shows that the Mac platform needs improvement inasfar as speed? IMHO it will not happen as iOS = $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
Some Mac users have now been forced into, 'kext-manipulation' et-alia and it will be not long before they depart to the, 'Hackintosh,' to get the best performance required noting that Ivy-Haswell offers minimal USER improvements, apart from MacBook battery-life, but is used by Apple to sell iOS.
Just my HO.