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Mac Pro shuts down during boot up

I installed the inateck PCI express card to get USB 3 into my mid-2010 Mac Pro. That seemed to go smoothly. But when I went to boot up, the power came up for about 5 seconds, then the computer turned itself off.


I removed the new card, but got the same result after.


Does anyone know what might be going on? Did I fry the motherboard by using my bare hands to install the card maybe?

Posted on Oct 6, 2015 6:05 AM

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Posted on Oct 6, 2015 7:46 AM

- Try resetting the SMC and NVRAM/PRAM

Intel-based Macs: Resetting the System Management Controller (SMC)

About NVRAM and PRAM

- Try starting in Safe Mode

OS X: What is Safe Boot, Safe Mode?

- Boot to Recovery and repair the startup disk

OS X: About OS X Recovery - Apple Support

- If it is repairable reinstall the OSX

How to reinstall OS X on your Mac - Apple Support


What OSX version?

Does the manufacturer say it should work with a Mac with your OSX version?

Unless a defective card It should damage the mac.

9 replies
Question marked as Best reply

Oct 6, 2015 7:46 AM in response to swasher1

- Try resetting the SMC and NVRAM/PRAM

Intel-based Macs: Resetting the System Management Controller (SMC)

About NVRAM and PRAM

- Try starting in Safe Mode

OS X: What is Safe Boot, Safe Mode?

- Boot to Recovery and repair the startup disk

OS X: About OS X Recovery - Apple Support

- If it is repairable reinstall the OSX

How to reinstall OS X on your Mac - Apple Support


What OSX version?

Does the manufacturer say it should work with a Mac with your OSX version?

Unless a defective card It should damage the mac.

Mac Pro shuts down during boot up

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