My experience with the 2009-2012 Mac Pros has show a problem with the power supply. I've had several that will restart on their own. As time goes by the frequency of these restarts accelerates. On every one of them, replacing the power supply solved the problem. The other main issue with these has been failing video cards, (my 2009 is on it's third).
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There also appears to be a sleep issue with Sierra. I have noticed that in the last couple of months I now have to press the power button to wake up after my machine has slept. I believe this to be an issue with a Sierra update.
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There also appears to be a sleep issue with Sierra. I have noticed that in the last couple of months I now have to press the power button to wake up after my machine has slept. I believe this to be an issue with a Sierra update. It is not happening with El Capitan.
My experience with the 2009-2012 Mac Pros has show a problem with the power supply. I've had several that will restart on their own. As time goes by the frequency of these restarts accelerates. On every one of them, replacing the power supply solved the problem. The other main issue with these has been failing video cards, (my 2009 is on it's third).
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There also appears to be a sleep issue with Sierra. I have noticed that in the last couple of months I now have to press the power button to wake up after my machine has slept. I believe this to be an issue with a Sierra update.
My experience with the 2009-2012 Mac Pros has show a problem with the power supply. I've had several that will restart on their own. As time goes by the frequency of these restarts accelerates. On every one of them, replacing the power supply solved the problem. The other main issue with these has been failing video cards, (my 2009 is on it's third).