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The Early 2009 Mac Pro—also known as the Mac Pro 4,1—introduced Intel's Nehalem architecture to Apple's line of professional desktop computers in March 2009. The Mac Pro 5,1 used the same interior design but received further CPU updates in 2010 and 2012.

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How to flash firmware to

how to upgrade firmware 4,1 to 5,1 on mac pro

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Here’s the guide on how to do it:

How to Upgrade the Firmware of a 2009 Mac Pro 4,1

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i, have a Mac pro 4.1 with High Sirra an i, want toupgrade to Majave

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