Wanting to run Mavericks, but my late 2007 2.2 GHz Santa Rosa 3.1 MB won't do it. Thinking of upgrading logic board to MB 5.2. Wondering when optical drive interface changed from PATA (IDE) to SATA - was it before MacBook 6.1? Probably look for an early- or mid-2009 board, because they run 667MHz RAM, so could use to my current modules, though this isn't a deal-breaker, could just buy new 800MHz or DDR3, as well. The 6.1 (unibody) board probably won't fit into an earlier case, will it? I understand the 5.2 had some fundamental, but workaroundable, differences (battery or MagSafe connector?) as well. Any comments, suggestions, tips, details of similar experience greatly appreciated.