This update is for MacBook Pro computers with Intel processors only.
Your computer's power cord must be connected and plugged into a working power source.
Note: Print or write down these instructions before you begin the update.
To update the firmware on your Intel-based MacBook Pro:
1. Quit all other open applications.
2. Click Shut Down in the MacBook Pro EFI Firmware Update window and wait for your computer to shut down.
3. Press and hold the power button on your MacBook Pro until the sleep indicator light flashes repeatedly or you hear a long tone, then release the power button.
A status bar indicates the progress of the update.
Important: Do not interrupt the update.
Your computer restarts automatically when the update is completed and opens the MacBook Pro EFI Firmware Update.
4. Click OK, if the firmware is now up-to-date.
If these instructions appear on your screen again, the firmware update was not successful. Repeat steps 2, 3 and 4.