I don't think you've done what was suggested.
Mount the DMG you downloaded then run the firmware hack with the official update mounted. The problem which error 5570 is that it can't find the update, because apple moved it. I came up against the same problem and found the answer on Google in about 5 seconds.
I hope someone knows the answer why my Mac Pro 2009 quad-core 4.1 is failing to accept the 5.1 firmware.
Although I encountered the error 5570, I managed to get through the procedure,...but.....after rebooting, waiting for the light to flicker...than the chime......and after almost 10 minutes booted up again as firmware 4.1.
I've PRAM'ed and tried at least 5 times, everytime the same thing,....flicker and chime, rebooting and....nothing!
Please download patched app from netkas.see attached screenshot. i keep getting the "5570" error pop up. message
Thats the original app from MacEFIRom.Or you can get it from MacRumors forum: https://forums.macrumors.com/attachments/mac-pro-2009-2010-firmware-tool-app-zip.423064/
For the impatient.
Sorry for this thread but I am going desperate here as I got a ''new'' 4.1 cMP dual 2.66Ghz and it is impossible to apply the firmware with all the tricks mentioned here and on Netkas website. I downgraded to OX Yosemite from El Capitan, disable SIP...etc... NOTHING works...always get the 5570 ERROR.
These are the actual settings:
Boot ROM Version: MP41.0081.B07
SMC Version (system): 1.39f5
SMC Version (processor tray): 1.39f5
I downloaded the 1.5 Firmware and applied the manual trick....NOTHING
Please help me before I get rid of the Mac Pro. Thank you!
PS. by the way, the GPU is a 7970 Radeon 3GB Gigabyte (flashed) Boot Screen
I'll sure need instructions as I have no clue about Boot Rom Dump and ESN label