The Mac Pro First Generation is an Intel Xeon-based workstation computer manufactured by Apple Inc. The first generation model includes the machines from 2006 through 2008.

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Mac Pro random issue almost solved

Recent issue.

Mac Pro Started to shut down randomly without any warning.

Max temperature ever reached 52c, don't think its enough for a shut down, right?

When I use smcControl app and turn fans 100% then Mac will not shut down.

I am wondering if there is a specific spot that I need to blast/clean and maybe some dust is blocking a sensor?

Issue still persists and I want to know if anyone can suggest something else.

What I did:

SMC zap p-ram and all the basics

Replaced 2 (not faulty) RAM modules for brand new ones, just in case.

Removed all HD's, graphic card and cpu/ram board and used compressed air using Compu Cleaner electric blower to clean everything.

Erased main HD and attempted to restore Sierra but now it shuts down when it gets to "14 minutes left" to install.

Im out of options. Is there a place that I can find a sensor location map for the Mac Pro?

What am I missing?

Update (06/14/2017)

Here is the image without any open apps

Block Image

Here is the image while playing 4k video

Block Image

Answered! View the answer I have this problem too

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Exactly which MacPro is it? Has it ever just restarted on its own?

I know od some RAM issues on the 2008 models but will wait for your identification.


MacPro Mid 2012 3.2ghz quad, 16gb ram, ate 5770

It never restarts on its own just complete shut down without warnings.

See temp pics below on the answer to Dan


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1 Answer

Chosen Solution

To get a better idea which sensor is failing using a tool like this: TG Pro. Then post a full screenshot of the main screen so we can see it as well.

Update (06/14/2017)

It looks like the #1 PCI slot is running hot (150℉) which is your GPU! As the heat stress is causing the GPU to shutdown when running your 4k vids.

The rest of the sensors are working and the systems fans are as well.

My guess here is the GPU is failing not the system as a whole. Do you have access to another GPU board? Hopefully one that is more powerful than what you currently have.

You may also want to take the heatsink and fan off the GPU giving both a good clean and refresh the thermal paste. Do make sure the GPU fan is working.

Update (06/14/2017)

Here is a good Apple T/N that gets into the Apple supplied boards: About graphics-card compatibility between Mac Pro models.

And here is a full listing on what will work in your system: Silver Tower Mac Pro GPU cards.

You do need to stay within whats listed here unless you can update the OS drivers (speak with the vendor as some are now offering drivers for their newer boards).

If you can swing it I would go with the ATI Radeon HD 5870 if you are planning on doing more 4k stuff.

As an example we use the newer MacPro's (Trash can) which has dual AMD FirePro D500 GPU's (technically it's only really using one) and it too gets on the warm side when processing 4k video's.

In any-case you might want to first see if you can get your current GPU working again by cleaning it up and re-applying the thermal paste. If you do get a new board do make sure you can return it if it fails to fix things.

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Answered with your request above


So replacing the graphics card should do the trick? What graphics card do you recommend?

Thank you for your input


Thank you for the valuable info


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