Apple has just released three "SMC Firmware Update" updates for its entire line of laptops.
They come to fix a ?rare? problem that could cause batteries with more than 1,000 accumulated charge cycles to simply stop working.
Three updates are available: MacBook 1.5 (494KB), MacBook Air 1.8 (982KB) and MacBook Pro 1.6 (666KB). They all require OS X 10.6.8 / 10.7.5 / 10.8.2 or higher.
According to reports from readers, the updates are not compatible with * all * MacBook models. If he reports that yours doesn't apply, just ignore it.