As many have said before this is a heating issue, I have the following configuration:
Hardware Overview:
Machine Name: MacBook Pro 15"
Machine Model: MacBookPro1,1
CPU Type: Intel Core Duo
Number Of Cores: 2
CPU Speed: 2.16 GHz
L2 Cache (shared): 2 MB
Memory: 2 GB
Bus Speed: 667 MHz
Boot ROM Version: MBP11.0055.B03
SMC Version: 1.2f10
Sudden Motion Sensor:
State: Enabled
This problem happen to me four times, and it was always when I tried to do something intensive (playing Quake IV or Doom III is a good example), at the beggining I did not take it seriously but one day while I was playing WoW (yes I do use the computer for fun ; ) the right fan started to do a ratttle like sound, and that was an unacceptable behaviour on my mac (specially if it interrupts my WoW session!). I called AppleCare (I did not buy the applecare warranty, and it must be clear that I have never and I shall never pay for this on a brand new computer), I explain to them my problem, they told me that what I was experiencing could be software related because the shut down was happening exclusivelly with Doom III. I hang up decided to prove them wrong, so I throw some tasks to my computer (as it was my belief that the shut down was caused by heat and usually more tasks mean more processing power which generates heat), I did open iMovie and applied some filters to a movie, iTunes was importing music, Xbench running on the back, copying a huge file from an external hard drive, updating my iPod, converting a file on Quicktime, downloading some stuff from the internet, compressing a folder (I was surprised how many things this computer could do at the same time without blinking) and then, I tried to play Quake IV ; ) - This was it, the computer immediatelly shut down - BINGO!!
I called AppleCare again and referenced my case number (this was given to me on the first call), then I update them with my recent experience (and bfore anyone asks, no they did not tell me that those were to much tasks for the computer), my call was forwarded to an apple technician (this was surprising for me, I thought that they did not have different levels of phone support), the technician asked me some additional questions and send me a nice app called "Capture Data". I was instructed to run the application on my computer. This little app - and cool BTW (it has an apple logo as an icon ; ), collects all your .log files and compress them into a .zip file. The technician also asked me to send him the file for reviewing. After he examined the contents of the file, he immediattely gave me a dispatch number. A day after I received a box to send the macbook pro back (prepaid shipping!), three days later I received my mac repaired (I did not have a
single penny, since this is covered by the apple warranty - regular one, no sugar - that expires a year later of the date of purchase).
Since then my mac is working like a charm, no more noises, no more heat and therefore no more shut downs (by no more heat, I mean that I can now put my computer on my lap!). They did replace my motherboard, the fan assemblies (two) and the sensor cables. Everyone there that is having this problem should call apple care and complain, they will take care of it, nobody deserves to have this kind of problems with a new computer, especially if it is an apple.
MacBook Pro Mac OS X (10.4.7) 15" 2.16Ghz, 2Gb Ram, 120 Gb, 256VRAM and it rocks!