When the Mac Pro Firmware Upgrade Utility Error 5570 occurs, it means the firmware upgrade of the Mac Pro has failed. The following procedures help you to understand the causes of the error and the solutions to fix error 5570 on Mac Pro:
1. Check the firmware version on Mac
2. Disable System Integrity Protection
3. Open the firmware file
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4. Shut Down System After An Update
5. Update Mac OS & Download Latest Firmware