Apple has released two SMC firmware updaters that fix an issue with MacBook batteries that have accumulated more than 1000 charge cycles, where the MacBook may unexpectedly shut down or stop functioning. If your MacBook needs this firmware update, it will show in Software Update for the following models…
• MacBook, 13-inch, Mid 2010
• MacBook Air, 11-inch, Late 2010
• MacBook Air, 11-inch, Mid 2011
• MacBook Air, 13-inch, Late 2010
• MacBook Air, 13-inch, Mid 2011
• MacBook Pro, 13-inch, Mid 2010
• MacBook Pro, 13-inch Early 2011
• MacBook Pro, 13-inch Late 2011
• MacBook Pro, 15-inch Mid 2010
• MacBook Pro, 15-inch Early 2011
• MacBook Pro, 17-inch Mid 2010
• MacBook Pro, 17-inch Early 2011