Apple has released several new firmware updates aimed at solving problems with its latest batch of notebooks.

Updates are available for all three Mac notebooks released in October: the new MacBook Pro, MacBook and MacBook Air. The notes accompanying the Software Update notification explain that "this update improves the stability of MacBook computers and addresses issues with sleep-wake, USB and device compatibility".

The company also released firmware updates for the SMC (system management controller) chip inside Mac notebooks, which helps regulate power consumption among other things. Those updates "improve the sensing and accuracy of the MagSafe Power Adapter indicator light and the battery charge indicator lights" on the new MacBook Pro and MacBook. The SMC update for the MacBook Air tackles just the MagSafe issues.

Several problems have been reported of late with the new notebooks, which also saw a firmware update issued earlier this year to correct a problem with the new glass trackpad design introduced with those systems. The SMC is the same part that would require a firmware update to fix the sleep/wake problems noted by some users, even though Apple doesn't call that problem out in the release notes for that firmware.

Owners of laptops purchased before the major redesign in October need not worry about these firmware releases.

Apple has released stabilising updates for its new MacBook, shown here, as well as other systems introduced in October. (Credit: Apple)