To complete the firmware update, wait for your Mac Pro to finish installing and shutdown. Hold down the power button until the power indicator light flashes, or you hear a long tone, then release the power button. A gray screen with an Apple logo and progress bar will appear while the update is taking place. When the update is complete your Mac Pro will startup
- This update improves system reliability during reboot, resolves an issue with memory self-test, and improves graphics power management when using Boot Camp.