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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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2011 mac pro stuck in boot loop

I am fixing a 2011 mac pro for someone. So heres the cheese: it boots up to the normal apple logo and then I get about 20% on the loading screen and lines of code start scrolling across the screen, then it blacks out and the GPU fan just guns it for about 5 seconds then it just repeats over and over and over and over and over

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I’d start by pulling the hard drives and booting externally from a Sierra installed drive and see if the issue is hardware or software related.

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I am very literate in fixing windows machines but I am not sure how to do that with a mac…very sorry

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I'm sorry, sounds like you do not have the know how or software tools to be working on a Mac Pro. I don't work on PCs for the same reason.

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technochicken 将永远感激不已
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