Apple today released MacBook SMC Firmware Update which 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.
To update the SMC firmware on your MacBook:
Your computer’s power cord must be connected and plugged into a working power source.
1. Quit all other open applications.
2. Click Restart in the MacBook SMC Firmware Update window and wait for your computer to restart.
The SMC firmware update starts automatically. A status bar indicates the progress of the update. During the update your computer fans will run at full speed, but will return to normal once the update completes.
Important: Do not interrupt the update.
Your computer restarts automatically when the update is completed and opens the MacBook SMC Firmware Update.
3. Click OK. The SMC firmware is now up-to-date.
More info and download link here.