This thread is obsolete, we had 5 BootROM updates after MP51.0085.B00.
Please go to the MP5,1: BootROM thread | 141.0.0.0.0
Please go to the MP5,1: BootROM thread | 141.0.0.0.0
High Sierra update to 10.13.6 has the much awaited Mac Pro 5,1 BootROM firmware upgrade on the full Mac App Store installer.
Apple updated the Intel Xeon microcodes on MP51.0089.B00 BootROM to the April 2
Microcode Update Guidance, but this microcodes are already superseded by July 3 Microcode Update Guidance.
MP51.0085.B00 microcodes:
MP51.0087.B00 missing all microcodes:
MP51.0089.B00 microcodes:
You need to download and run the Mac App Store full installer.app for 10.13.6. Don't forget that a EFI supported GPU (Apple GT120/HD4870 with a 2009 or HD5770/HD5870 if a 2010/2012) is needed to do the upgrade of the BootROM. It will work with EFI flashed GPUs and For Mac models like Sapphire HD7950, eVGA GTX680 and Quadro 4000 Mac Edition too.
Geekbench4 scores:
10.13.6 0085:
10.13.6 0089:
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