Jul 09, 2015

Apr 01, 2020 · Learn about the Mac features and tools that you can access by holding down one or more keys during startup. To use any of these key combinations, press and hold the keys immediately after pressing the power button to turn on your Mac, or after your Mac begins to restart. Keep holding until the described behavior occurs. Feb 05, 2020 · I had the same issue on my MacBook Pro and tried many of the above suggestions (from another site, not this one). I could not figure out why my MacBook was suddenly acting up. Then I realized that our school had put a program on my computer that help with calling students at home. That means if your Mac or MacBook Pro can’t mount its startup disk, it is likely that you will experience problems, like your computer gets stuck on the login screen or it does not boot at all. Situations like this can be very annoying, especially if you have critical and important files stored on the “unmountable” hard drive. May 19, 2020 · To initiate Safe Boot, start up your Mac and hold down the Shift key as it powers on. If this works, try shutting down and starting your Mac normally: A Safe Boot can sometimes reset things enough Reset the SMC on Mac notebook computers. First, determine whether the battery is removable. Mac notebook computers that have a nonremovable battery include MacBook Pro (Early 2009) and later, all models of MacBook Air, MacBook (Late 2009), and MacBook (Retina, 12-inch, Early 2015) and later. Feb 21, 2020 · Mac fails to boot or start after the macOS update. Whatever is preventing your Mac from starting up, follow these 5 simple solutions to get it working again. If you have data loss problem after macOS update, EaseUS Data Recovery Wizard for Mac provides tried-and-true data recovery service to you. May 25, 2013 · This did not work. • Starting up in Target Mode connected to a Mac Pro. This did not work. • Booting up in recovery mode (holding down command and R, and then pressing the power button). This did not work. The computer could not start up long enough for this to be effective. • Using Safe Boot (pressing power button while holding shift).

Jun 10, 2020

Reset the SMC on Mac notebook computers. First, determine whether the battery is removable. Mac notebook computers that have a nonremovable battery include MacBook Pro (Early 2009) and later, all models of MacBook Air, MacBook (Late 2009), and MacBook (Retina, 12-inch, Early 2015) and later. Feb 21, 2020 · Mac fails to boot or start after the macOS update. Whatever is preventing your Mac from starting up, follow these 5 simple solutions to get it working again. If you have data loss problem after macOS update, EaseUS Data Recovery Wizard for Mac provides tried-and-true data recovery service to you. May 25, 2013 · This did not work. • Starting up in Target Mode connected to a Mac Pro. This did not work. • Booting up in recovery mode (holding down command and R, and then pressing the power button). This did not work. The computer could not start up long enough for this to be effective. • Using Safe Boot (pressing power button while holding shift). Press and hold the power button to shut down and start your Mac back up. 2. Go to System Preferences > Software Update. Or, if you are on an older macOS verison, go to the Mac App Store and open

I had same issue. I'm using 15" inch MacBook Pro 2018 with 32GB of ram still get the message "Engine won't start". My OSX version is 10.15.6 Catalina.

5 Ways to Fix Your MacBook Pro When it Won’t Start