Steps to fix an Apple Mac when it hangs:
- Unresponsive apps must be forced to close.-Whether your Mac is unresponsive, the first thing you should do is see if an app has frozen, as this can occasionally cause your Mac to lock up. If you can't leave an app because it's frozen, press Ctrl+click on its icon in the Dock, then hover the pointer over the Quit button.
- System Management Controller should be reset.-The System Management Controller (SMC) is responsible for a variety of tasks in your Mac, including battery management and keyboard illumination. It's possible that the SMC has to be reset if your Mac continues freezing.
- PRAM/NVRAM should be reset.-PRAM and NVRAM are small regions of memory on your Mac that hold settings that the computer needs to access fast. It's possible that a problem with the PRAM or NVRAM is causing your Mac to freeze.
- It's possible that resetting them will assist, and the procedure is the same for both. Shut down your Mac, then turn it back on while pressing Opt+Cmd+P+R. Hold these keys down for 20 seconds; your Mac may restart during this time, but continue to hold them down for the whole 20 seconds.
- Start your computer in safe mode.-Safe mode can help you figure out what's causing your Mac to freeze in the first place, or it might help you figure out what's causing the problem in the first place. Safe mode checks the integrity of your starting disc and blocks the execution of certain programs and processes.
