i wouldnt worry about it.. currently running it through my external on HDD due to the fact i dont want to move over until bugs are fixed, Office works, which is major, and having to dig out serials if programs dont adjust properly..
oh late 2009, 4gb, 2,26ghz
just go for it, im guessing your mac came with a SL recovery disk, so just back up your system and either restore from that with SL or start a blank with a fresh install if problems persist
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