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SMC Firmware Updates for MacBook, MacBook Pro, and MacBook Air

Apple has released three System Management Controller (SMC) firmware updates for its MacBook lineup: MacBook SMC Firmware Update 1.5 (494 KB), MacBook Pro SMC Firmware Update 1.6 (666 KB), and MacBook Air SMC Update 1.8 (982 KB). All three address a “rare issue” that caused laptops with a battery that had accumulated more than 1,000 charge cycles to shut down and possibly fail to boot back up again. According to this Apple support page, all recent MacBook Pro and MacBook Air models (as well as MacBook models from 2009 and later) have a lifetime expectancy of 1,000 charge cycles. As always with firmware updates, we recommend relying on Software Update or the App Store app to ensure you get the firmware update for your specific model, and be careful not to interrupt the update process. (Free)

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