If it does then create a new user account. Then restart in Safe Mode and operate for a while to determine if the problem persists. Intel-based Macs: Resetting the System Management Controller (SMC) If nothing shows up above then try these: Be sure to note the name of the runaway process so you can track down the cause of the problem. Click on the Force Quit button to kill the process. 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 twice on the CPU% column header to display in descending order. Select All Processes from the Processes dropdown menu. Open Activity Monitor in the Utilities folder. Your problem most likely has another less damaging solution. Do not attempt to make changes to your fan's normal operation.
