Mac Pro Firmware Updates

Firmware is the name given to software that is written into memory circuits, such as flash memory, that will hold the software code indefinitely, even when power is removed from the hardware. Firmware on Intel Mac computers is designed to be updated if necessary through a software update.

EFI and SMC firmware is stored on the Mac Pro (Early 2008) logic board. EFI firmware updates update the Boot ROM, and SMC updates update the System Management Controller firmware.

The SMC manages fans and other environmental parameters that are independent of the Boot ROM.

Firmware symptoms can be easily mistaken for hardware issues (e.g., overheating issues, fan noise issues, etc.). Always check both EFI and SMC firmware versions and update if necessary before replacing any hardware components in the Mac Pro (Early 2008).

The following lists describe the type of symptoms that may be resolved by updating the EFI and SMC firmware in the Mac Pro (Early 2008).

Symptoms that may be resolved by updating EFI firmware:

  • Cannot eject media (various conditions)
  • No video on start up
  • Blue system failure screens in Windows XP/Vista
  • Not waking or sleeping when expected
  • Bad media taking too long to eject (including holding mouse button down at startup taking minutes to eject)

Symptoms that may be resolved by updating SMC firmware:

  • Fan related behavior (excessive speed or noise)
  • Loud audible clicking from some fans
  • Thermal shut down or warnings
  • Diagnostics reporting failures
  • Sleep/wake issues
  • Intermittent shut down
  • SMC causes bad/missing ambient sensor to cause the computer to go to sleep
  • Hangs, black screen on restart from Windows
  • Quick power cycle causes Memory Riser Card Diagnostic LEDs & CPU Overtemp LEDs to illuminate solidly
  • Unit does not restart after changing configuration in Expansion Slot Utility

Please follow the steps outlined in KnowledgeBase article 303364, "About Firmware Updates for Intel-based Macs," to perform an EFI and/or SMC firmware update. Information about firmware versions for Intel Macs can be found in KnowledgeBase article 303880, "Mac OS X: Firmware Updates for Intel-based Macs."

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  • artemia
    Where are firmware updates stored on mac?
    9 years ago
  • HELI
    How to upgrade hardware firmware on a mac?
    9 years ago
  • prima
    Can firmware on early 2008 Mac Pro be flashed?
    9 years ago

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