Fan constantly turns on after installing El Capitan and opening a few applications. Any fixes for this or should I roll back the OS.
Check whether any applications are constantly running and burning CPU by using Activity Monitor (Located in /Applications/Utilities).
If there are no applications burning CPU, try resetting the SMC:
- Shut down the computer.
- Plug in the MagSafe or USB-C power adapter to a power source and to your computer.
- On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
- Release all the keys and the power button at the same time.
- Press the power button to turn on the computer.