Re: 2007 hardware obsolete?
2007? a 7 year old machine? So you'd expect a machine bought in 2000 to run the Vista in 2007 or a machine bought in 1993 to run Windows 2000 in 2000 or a machine bought in 1986 to run Windows 3.11 in 1993 or a…
Or a 1986 Mac Plus to run System 7.5.5 (released in September 1996). And that's even after Apple had transitioned the Macintosh platform from Motorola's 680x0 to PowerPC. Sorry, but Apple (used to) have a pretty good record supporting older hardware.
The point's moot on 2007 hardware anyway. The real reason for those Macs being unable to run ML and Mavericks is that 10.8 and newer are now 64-bit only. Apple jumped ship to Intel too early, they should've probably waited 'till the 64-bit processors came out. PPC was 64-bit already after all. They'd probably have all users on Mountain Lion as a minimum if they hadn't killed Rosetta on Lion and newer.