Apple fixes battery-related shutdown issue with MacBook Pro and MacBook Air firmware updates

According to the release notes, mid-2012 MacBook Pro and Retina MacBook Pro models are affected by the update, while the MacBook Air update applied to mid-2012 and mid-2013 models.

For the MacBook Pro's SMC Firmware Update 1.8:

This update is recommended for MacBook Pro (mid 2012) models.

This update addresses rare issues where the battery unexpectedly stops functioning or the system hangs when the battery charge reaches less than one percent.

The same language is used for the MacBook Pro Retina SMC Update 1.2:

This update is recommended for 13-inch MacBook Pro with Retina display (late 2012) models, and 15-inch MacBook Pro with Retina display (mid 2012) models.

This update addresses rare issues where the battery unexpectedly stops functioning or the system hangs when the battery charge reaches less than one percent.

Finally, the MacBook Air SMC Update 1.9:

This update is recommended for MacBook Air (mid 2012 and mid 2013) models.

This update addresses rare issues where the battery unexpectedly stops functioning, the system does not recognize the battery, or the system hangs when the battery charge reaches less than one percent.

It is not clear how widespread the battery bug was, though a quick search in Apple's Support Communities webpage yields a number of hits for threads pointing to such issues.

The latest SMC updates can be downloaded through Apple's Support Downloads webpage, or via Software Update. Those looking to grab the new firmware on Apple's website may have to wait until the respective pages are refreshed, as they currently show information and links to prior updates.