SMC Firmware Update for the MacBook

A SMC (System Management Control) firmware update for the MacBook is available via Software Update (790 Kb). It seems to fix the "moo" problem with the fans.

The SMC Firmware Update adjusts fan behavior in the MacBook. After this update has completed successfully, your SMC Version will be: 1.4f10. The updater application will be installed in the /Applications/Utilities folder. Please follow the instructions in the updater application to complete the update process.