sad news indeed I hope your first light is good for the second time. You must be getting used to that mac! best wishes loading everything back up to speed.
PS- i rebuilt an older PC getting all the software loaded, licencing paid for and then the whole lot died on me (happend to me two weeks ago with the observatory PC) - motherboard, processor and memory - salvaged the video card. trouble was i had a Raid array setup i have 5 disks in the machine - c drive and raid 5 storage on the other 4. Ok overkill for a PC for the observatory but it was only to be used for guiding and data capture. Might try to rebuild another PC... XP pro doesnt like all new hardware for some reason