Fixed: macOS High Sierra Overheating and Fan Running Constantly


High Sierra update has created many issues on Mac. one of the important problem is overheating and fan running continuously. My MacBook Pro becomes overheating after updating it to High Sierra. The fan makes so much noise while using Mac. Here I am going to tell you why your Mac becomes overheating and solutions to solve this issue.
Why Does My MacBook Becomes overheating?
Overheating is usual after updating your system to a new Operating System. So wait for a week. If it continues, take a step to solve this issue.
Why does fan running constantly?
The fan in your Mac will run constantly if your Mac reaches a certain temperature. The fan will try to cool the Mac by running. Sometimes, the fan can’t cool the Mac even if it’s running constantly. Actually, the fan will run with noise if your Mac updates apps in the background. So you don’t need to worry about Fan spinning.
Tow simple ways to make your Mac cool:

  1. Stop the Finder from indexing your Hard Drive.
  2. Shut down your Mac for a while when it gets overheated.

Solution 1: Restart

  1. Shut down your Mac vis Apple Menu->Shut Down.
  2. Wait for a while and then turn on your Mac.

Solution 2: Reset SMC
If your Mac has a non-removable battery,

  1. Shut down your Mac via Apple menu->Shut Down.
  2. Press and hold the Shift + Control + Option + Power Button simultaneously.
  3. Then release the keys at the same time.
  4. Turn on your Mac by pressing Power Button.

If your Mac has a removable battery,

  1. Shut Down your Mac.
  2. Remove the battery out of your Mac.
  3. Press and hold the Power Button for 5 seconds.
  4. Insert the battery into your Mac.
  5. Turn on your Mac by Pressing Power Button.

Solution 3: Restart your Mac in Safe Mode (Safe Boot)
Restart your Mac in Safe Mode will fix many issues on your Mac. you can’t use some features in Safe Mode.

  1. Turn off your Mac via Apple menu->Shut Down.
  2. Turn on your Mac.
  3. Press and hold the Shift Key as quickly as possible after you hear the startup sound. You can see the Apple Logo on the Screen.
  4. Keep pressing the Shift Key until you see the Login Window.
  5. Enter your User Name & Password to login. You may need to login twice if FileVault is turned on.

Solution 4: Check CPU activity using Activity Monitor
Make sure that Mac apps not using more of the CPU than its limit.

  1. Launch Activity Monitor->View->All Processes.
  2. Click “% CPU”.
  3. Check how much CPU is used by each app and whether apps are using the CPU within its limit or not.

If the apps on your Mac using more of the CPU than its limit, fix this issue first.
SEE ALSO: System Taking Up Too Much Space on macOS High Sierra
Other Solutions:

  1. Make sure that vents are not blocked. Don’t use your Mac on your lap and your bed.
  2. Do not use your Mac in the Sun.
  3. Remove the dust in your Mac very carefully.
  4. Reinstall High Sierra.

If you know any other Solutions to fix this issue, let us know through your comments.

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