I have an iMac (Mid 2007) upgraded to Lion OS. My fan runs at high speed all the time. I reset the SMT without results. I had no way to do the hardware test.
Can I fix this high fan speed?
iMac
Open Activity Monitor in the Utilities folder. Select All Processes from the Processes dropdown menu. Click twice on the CPU% column header to display in descending order. If you find a process using a large amount of CPU time, then select the process and click on the Quit icon in the toolbar. Click on the Force Quit button to kill the process. See if that helps. Be sure to note the name of the runaway process so you can track down the cause of the problem.
If the above doesn't help then create a new user account. Log into the new account. Does this fix the problem?
I have an iMac (Mid 2007) upgraded to Lion OS. My fan runs all the time at high speed. I tried the SMT reset without results. I could not try the AHT test because it is not on my computer or install disk. Any suggestions what I can do to correct the fan
