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Tips

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SMC Reset for Early Mac Pro

For 2012 or earlier Mac Pros which aren't fixed by a standard SMC reset, use the SMC reset button on the motherboard...

Shut down.
Unplug the power cord.
Open the Mac Pro side access panel.
Just below the drive 4 sled and next to the top PCI-e slot is a small button labeled SMC.
Press and hold it for 10 seconds.
Close the side door.
Reconnect the power cord.
Wait 5 seconds.
Start the Mac normally.

Also try a PRAM reset, if this doesn't help.


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