Mac Pro 4,1 to 5,1 Firmware Upgrade High Sierra

You lot’ll need to disable Organization Integrity Protection (SIP) in order to wink the new firmware.

Restart your Mac Pro and concur
cmd+r
to kicking into the recovery segmentation on your kick drive.

Once in Recovery Mode, get to the Utilities bill of fare at the top of the screen and click
Terminal

Enter the following command:

csrutil disable

Hit return and restart your Mac Pro every bit normal.

While the tool was originally designed to pull the firmware directly from Apple’s website, a change in the file location and name on Apple’s part has fabricated it necessary to download & mount the .dmg prior to running the tool.

Double click the firmware file yous downloaded in step one to mount the disk epitome to your desktop.

Right click and select “Open” on the firmware update tool. Since it is not signed with the proper certificate, macOS will probable turn down to open up it just by double clicking the file. Right click the file and open up from the carte du jour to fix this.

Y’all should accept ii options in the window – upgrade to 2010 firmware and downgrade to 2009 firmware. Only i option will exist available at whatever given time, dependent on which firmware you have installed.

There is really no reason to e’er downgrade to 2009 firmware, equally none of those machines are still under any warranty from Apple and the organization discs are not equally important now that all OS versions are given equally software downloads.

Y’all are not required to upgrade your CPUs if you update to the 2010 firmware- your original system configuration will continue to operate as it e’er has.

Be sure to read whatever and all information that the utility may pop upward.

IF YOU Have DIFFICULTY: Try using this
alternate tool.

After the tool has finished its work, it will tell you to shut down your computer. Merely perform a normal shut downward process.

After your Mac Pro is powered off, concur the power push down until you come across the power LED blink quickly or you hear an aural tone. The blinking LED will precede the tone.

Your reckoner should now brainstorm to update the firmware on its own. You should see a gray screen with a progress bar at the bottom of the screen.

This is a different bar than you would normally come across with macOS- the firmware updating bar will be a hollow rounded rectangle that slowly fills up, rather than simply a bar that slowly gets longer as you would typically see.

Your computer may restart on its own again post-obit the wink.

Once your car has rebooted to the desktop, information technology’s time for the moment of truth.

Open
Well-nigh this Mac
and click on
Arrangement Report

It is worth noting that
About this Mac
will still report this as a Mac Pro (2009), even after a successful flash.

In
Arrangement Report
you should run into a line in the commencement window labeled
Model Identifier
– if the firmware flash was successful, you should see
Mac Pro5,1

Unless y’all have a compelling reason otherwise, you’ll want to reenable SIP. Once more, you’ll have to become into Recovery Manner just like yous did earlier and open the Terminal.

Enter the following control

csrutil enable

Reboot the auto and let it load to the desktop. Open up a new terminal window and enter the following command to cheque the status of SIP

csrutil status

If all was successful, you should become a line back that reads:

Organisation Integrity Protection status: enabled.

And that’s all in that location is! Now you should be able to upgrade the processors to a much wider swath of options.