System Management Controller is designed to deal with several pivotal settings such as power management, fan control, temperature monitoring, and more. Make sure to hold down these keys for about 20 seconds and then release the keys.ĭo note that if you have an older Mac that makes a chime sound at boot, you will need to hold down the keys until a second startup chime is heard. Then, you need to press the power and immediately hold down the Command-Option-P-R keys. Times when Mac appears to take a lot of time to find out which disk to boot from or starts up with the wrong screen resolution, this solution comes in handy in solving the problem.

Read – MacBook Crashes and Freezes: Tips to Fix the Issue Reset the PRAM / NVRAMĪ lot of times you can get rid of the booting issues of your Mac just by resetting NVRAM. Try and remove the programs which are starting at login one by one and see if system boots normally after that. If you can successfully start the device in Safe Mode, then it’s a process of elimination. Keep in mind that Safe Boot usually takes a while to kick in. Then, you need to start your computer while holding down the Shift key. To enter Safe Mode on your Mac, first shut it down. If the issue is being caused by a 3 rd party software, then the Mac should boot in Safe Mode. Safe mode loads ONLY the bare essential services and programs required by Mac to boot successfully and no 3 rd party software and services are allowed to start.

For those unfamiliar, Safe Mode is designed to make it a bit straightforward to determine whether issues you face are caused by the software that loads when the Mac starts up. Boot Your Mac in Safe ModeĪnother reliable solution for fixing the Mac that won’t boot up properly is to use the Safe Mode. So, give it a try first up to see how it fares. At times, the attached peripherals can prevent the computer from starting up. The very first thing that you should do to resolve the booting issues on your Mac is to disconnect all the accessories including the printers and USB devices connected to your Mac. With that said, let’s get started with the troubleshooting guide! Disconnect All of Your Accessories But fret not, these pro tips can help you fix booting issues on your Mac and make it start normally again. Not to mention, hardware issues have also been found to be one of the major reasons behind the unexpected boosting problems on iMac or MacBook. At times, it’s due to corrupted OS, on other times it is owing to some crashed or malfunctioning software or app that hinders the Mac from starting up normally. Booting issues have existed on macOS since its inception.

Entering safe mode on mac pro