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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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2009 Mac Pro Desktop Black Screen Issue During Update

Hello all !

I want to start out by saying any help is appreciated here! I repair computers on a daily bases but I am not super familiar with the Macintosh side of things.

I have a customers computer that has a couple different problems. The first one is fixed which was some funny power management issue with the old power supply. Swapped it out, so the first problem is fixed.

Now the second problem. Keep in mind I don’t have another Mac computer to work with here being as I typically work with Windows computers. (I actually purchased one and have one on the way). I press the power button, and the Mac OS starts into what looks like an update (loading screen with apple logo.) The customer doesn’t recall starting a Mac OS update on their otherwise obsolete system. But it looks like maybe they did. Although she did mention it kept asking her to update. As soon as the progress bar gets to a certain point, about 3/4 the way done. The monitor goes to sleep or into standby mode. (Black screen). I’ve done this several times and determined it’s the exact same spot where the monitor cuts off each time. What it looks like to me is, a macOS update taking place that isn’t compatible since the monitor is shutting off. I also need to save her data, she has some important stuff on here.

So, my question is, how do I revert back prior to this update? Every time the computer turns on, it goes to this progress bar until the monitor eventually turns off. A step by step guide would be great, so I can get this thing out and move onto something I’m more familiar with. Any help or guidance is appreciated!!

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34 Yorum:

Maybe you can try SAFE MODE first:

https://support.apple.com/en-gb/guide/ma...

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You could probably get the data off the HDD/SSD if you put it into a caddy connected to another Mac. Or use Firewire target mode?

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@John Yes, that's the plan. I think its the only option at this point. Do you have a solution for formatting to Catalina? from a clean HDD?

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@Dustin Short you can use Recovery mode https://support.apple.com/en-gb/guide/ma... - but Catalina is not officially supported by Mac Pro 5.1 - latest is macOS Mojave with metal support GPU, or macOS High Sierra without metal support GPU. You will have to use OpenCore or similar software to get newer macOS.

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@Rob Ok. Let me ask you this. What’s the best version I am able to put on a 2009 Mac Pro Desktop? If I were to use “OpenCore” or similar software, does a compatible version need to be formatted first? What’s the best way to wipe the drive after data is backed up? I don’t think I am able to open the recovery app, absolutely nothing works.

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Here is a picture of what its doing.

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I am afraid that this is not hard drive issue :( - it’s look more like GPU/mother board issue to me to be honest :(

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Can you make picture of serial number so I can check full specs

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Where do I find the serial number? Looking at the bottom I see FCC FCCID numbers but can't locate a serial number.

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@dshort1988 It’s on the back just under GPU output is sticker ( https://www.homeserve.com/en-us/blog/how... ). Maybe try reset NVRAM and PRAM - https://support.apple.com/en-us/HT201255 sometime it can help.

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Ill go ahead try this again. Hold-on. Sorry this is such a mess. Also I see the sticker now - let me send this over.

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I've already tried that actually - Its one that did work and it did do what it was suppose to do but it didn't fix anything. Heres a picture of the only sticker on the bottom of the unit. I also sent over another email. See picture.

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