My mac is running at 175 Fahrenheit? Why so hot?

As old as your iMac is, have you cleaned out the dust? Dust buildup can lead to over heating issues. Remove any and all things plugged into it including the power cord, Remove the RAM access grille. Vacuum all openings starting with the RAM access area (air intake). Vacuum all ports and plugs, DVD slot and the opening across the top of the rear of the body. Blow compressed air through all your openings and vacuum again to remove any dust you loosend. Reinstall the RAM grille. Plug in the keyboard and mouse if not blue tooth. Insert power cord...

You are now in a perfect position to do a

SMC RESET

http://support.apple.com/kb/HT3964

Shut down the computer.
Unplug the computer's power cord and ALL peripherals.
Wait 15 seconds.
Attach the computers power cable.
Wait another 5 seconds and press the power button to turn on the computer.

Here is a Widget to monitor your temps and other operations:

http://islayer.com/apps/istatpro/

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Answer 3

a brody

Level 10

85,366 points

Jun 16, 2012 6:39 PM in response to Zukowski98

Make sure the ambient temperature meets specs:

http://www.apple.com/imac/specs.html

Are you saying it gets faster simply upon booting after a long time? I don't trust any temperature tool, and certainly not any temperature modification tool. If you are getting freezes and four language screens that can't be force quit from with command-option-escape, you may have a hardware problem the hardware test came with the Mac can isolate:

http://docs.info.apple.com/article.html?artnum=303081

You can call AppleCare if you need one of the discs that came with it, if it is older than July 20, 2011. Otherwise, you may need to bring it in for service if the hardware test does not come up on its own.

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