Apple Releases MacBook SMC Firmware Update 1.1

Apple has released MacBook SMC Firmware Update 1.1, which aims to improve the MacBook's internal monitoring system and address issues with unexpected shutdowns.

A number of MacBook owners have had their MacBooks intermittently randomly shut down on them, an issue which has come to be known as MacBook RSS (Random Shutdown Syndrome). In a recent summary of the issue, including a pending class-action lawsuit, AppleInsider quotes Ogrady's PowerPage that nails down the root cause of the issue to the following:

"Essentially the heatsink can expand during use, and comes into contact with the lead from the [thermometer's] sensor cable," reads a more detailed explanation posted at Ogrady's Power Page. "A short circuit results, and the SMC (System Management Controller) pulls the plug. Once the system cools down, the heatsink [recedes] and the contact is broken."

As is the case with all firmware upgrades, Apple cautions users to not interrupt the update. Detailed information regarding the update can be found here.

Related Forum: MacBook

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