MacBook Intermittent Shutdown Problems
It appears that users of MacBook facing intermittent shutdown problems may be dealing with overheating issue.
An IT engineer in Munich, German claims to have solved the problem of random shutdowns experienced by some MacBook owners.More...
The issue apparently stems from the cable between the heat sensor and the CPU's heat sink, which is reportedly too short. The notebook's heat sink expands during operation, according to the engineer, and comes in contact with the sensor cable melting through the cable's insulation. Once the protective outer layers of the cable melt away, the cable touches the heat sink which causes a short circuit, resulting in an immediate shutdown. As the heat sink cools it contracts and loses contact with the cable, allowing users to once again boot their MacBooks until the processor heats up again. MacBook owners may not have to exchange the motherboard or memory if the discovered phenomenon proves to be the issue causing the random shutdowns.
Website dedicated to RSS (Random Shutdown Syndrome)
Apple officially acknowledges RSS: KB Article 304308