The SMC Firmware Update
addresses boot issues with the Mac mini.
The updater application will be installed in the /Applications/Utilities folder and will launch automatically after restart.
Please follow the instructions in the updater application to complete the update process.
Here are the instructions within the updater, as they appear for the Mac mini Updater:
To update the SMC firmware on your Mac mini:
1. Quit all other open applications.
2. Click Restart in the Mac mini 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 Mac mini SMC Firmware Update.
3. Click OK. The SMC firmware is now up-to-date.
If these instructions appear on your screen again, the SMC firmware update was not successful. Repeat steps 2 and 3.
For detailed information on this Update, please visit this website: http://www.info.apple.com/kbnum/n303725