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Re:How 'Marklar' OS X on Intel owes its start to a one-year-... by msbarnett on Sunday June 10, 2012 @04:37PM (#4092126)
Worth noting, though, that those x86 builds used, and that classic theme was built in, Display Postscript.

The newer Quartz display subsystem only ever shipped for the PowerPC in the dev previews.

Re:How 'Marklar' OS X on Intel owes its start to a one-year-... by lukeh on Monday June 11, 2012 @05:12AM (#4093788)
And the kernel changed from Mach 2.5 to Mach 3, see http://en.wikipedia.org/wiki/XNU.