I have an orig 1,1 2006 with 2x Xeon 5160 3.0 ghz duo core (4total cores no hyper threading). 12 gig memory, ati 5770 on 10.6.8 OS I don't play games Mostly browsing and MS office docs I was not planning on CPU upgrade as I'm not sure quad core 3.0 is worth hassle. Also no nèed for memory or gpu upgrade. Question to replace the 4x750 Gb HD with one or more ssd. I'm backed up on an AirPort Extreme and Drobo nas. 1. Does 10.6.8 support ssd for the 1,1 with TRIM 2. Do I need to upgrade to 2,1 with firmware tool if I don't upgrade cpu just because I could go higher in OSX build?? 3. Should I install Yosemite and go through all hoops for that? I'm not sure I need it. Continuity not a big thing with me nor is iMessage from computer. ITunes is though but not clear need newest version. Photos stored in aperture already.