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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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Black screen when try to installing a new OSX!

Hi guys.

I tried to install the new HIGH Sierra on my Mac Pro (Early 2009).

I upgrade my video card for NVIDIA GeForce GTX 650 Ti BOOST 2047MB.

I did ALL updates like: Firmware 5.1 etc etc etc...

When I try to install by pen drive in a HD SSD the new Sierra, my screen is black. I can't see anything.

Why? In another forum, I saw that's installation will only install with the original video card. Its true? Because I sold my original 522MB video card :(

Thanks for any help,

Martini

Answer this question I have this problem too

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I think that the problem is in the GPU. You need to have the stock GPU, because the other ones are Non-EFI GPU’s. I don’t know if the Clover EFI bootloader will help, because I never tried it.

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Leandro Martini will be eternally grateful.
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