File: How to install High Sierra on Apple Mac Pro 4.1 (Firmware Update)

How to install High Sierra on Apple Mac Pro 4.1 (Firmware Update)

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Learn how to install macOS High Sierra on an unsupported Mac Pro 4.1 by manually flashing the firmware to version 5.1.
Part 0 – Introduction ➜
Part 1 – Bluetooth ➜
Part 2 – High Sierra ➜
Part 3 – SATAIII SSD ➜
Part 4 – Graphics ➜
Part 5 – Memory ➜
Part 6 – CPU ➜

According to my research, the Mac Pro 4,1 and 5,1 have virtually identical hardware.

However, for some reason, you cannot install High Sierra on an early 2009 Mac Pro unless you manually update the system’s

How to Use:
Open destination folder and locate file notes.txt, open it and read step by step.
Enjoy!

Don’t forget to read instructions after installation.
Enjoy How to install High Sierra on Apple Mac Pro 4.1 (Firmware Update). for MAC OS/X

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