Mac pro fans going full bore
- Thread starter proteus
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Mac Pro fans
There are a number of things that cause the fans to run like you are describing. In my experience, it is frequently caused by a defective memory module. The memory risers in the Mac Pro have LED's, that if lit, point to a bad stick. I'd start looking there.
If the LED's are not lit, I'd try running the Apple Hardware Test located on your original install disk.
A
There are a number of things that cause the fans to run like you are describing. In my experience, it is frequently caused by a defective memory module. The memory risers in the Mac Pro have LED's, that if lit, point to a bad stick. I'd start looking there.
If the LED's are not lit, I'd try running the Apple Hardware Test located on your original install disk.
A
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- Silver M1 iMac 512/16/8/8 macOS 11.6
Starting in Single User Mode can cause this and also check out System Preferences > Energy Saver > Options and make sure Automatic is selected as Processor Performance and not 'Highest".
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- MacMini 14.3, 8.1 & 4.1, OS 13.5, 10.14, & 10.11 & 10.6; Macbook Pro 8.2, OS 10.12.
I recall reading elsewhere about faulty thermostats in some Pros - 'cept I don't think they're called thermostats, more like heat controllers or regulators or something. HTH
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