Apple fixes MacBook random shutdowns with firmware update?

Last we heard, random shutdown syndrome was being cured by the replacement of one of the MacBook’s heat sinks. But today, Apple released a firmware update for MacBooks that claims to address the problem.

The SMC Update improves the MacBook’s internal monitoring system and addresses issues with unexpected shutdowns. This update is recommended for all MacBook systems, including those that received warranty repair.

Could it be that the nightmare is finally over and everything will be gumdrops and sugar plums once again? The same knowledge base article implies that there’s a chance that the firmware update will not solve the issue: “If you continue to experience trouble with your MacBook after applying both updates or if your MacBook is in a state that will not allow you to install the updates please contact AppleCare for further assistance.”

SMC stands for System Management Control, which handles internal technologies such as heat and fans. That jibes with what we know about the problem—i.e., the heat sink—but that there’s a software fix suggests that perhaps the fraying heat sink cord is a red herring.

I’m about to send my MacBook under the knife over here. Install away and let us know if you continue to have random shutdowns. We’re all ears on this one.