SpeedFan is a program that monitors voltages, fan speeds and temperatures in computers with hardware monitor chips. SpeedFan can even access S.M.A.R.T. info and show hard disk temperatures. SpeedFan supports SCSI disks too.

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Temp Monitor app is an unobtrusive tool which will alert you when your Mac overheats, and the perfect utility to help you log all instances when the processor goes beyond a temperature which might be dangerous for both your Mac and yourself, if you’re using a MacBook or MacBook Pro.

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