Restart Mac computer to see if you can enter the system or not. Wait for a few minutes and then plug the cables back ģ. Shut down Mac computer and unplug all cables Ģ.
So if Mac cannot boot after system update, you can reset SMC to fix Mac won't boot issue after macOS High Sierra update: How To Create A Startup Disk For Mac High Sierra Downloadġ. Sometimes, if the Mac computer cables are not connected properly, you may not be able to boot it normally. Reset SMC to fix Mac won't boot after High Sierra update Just follow any one of offered methods to get your Mac computer back to work again now: Quick Fix 1. If you are having such a problem, relax! This tutorial article will show you how to quickly fix and resolve Mac hard drive won't boot issue after macOS High Sierra update. But it's still a tough case for ordinary users to fix when their Mac computers fail to boot after macOS High Sierra update or installation. What else can I do to wake up the computer and make it work again with macOS High Sierra?'Īlthough Mac hard drive boot failure issue is not a new problem anymore. I tried to hard reboot Mac computer, but nothing showed up. And when I completed the update process, tried to start the computer.
' I upgraded my iMac into latest macOS High Sierra last night. Mac won't start/boot after macOS High Sierra update/installation, help!
Now that you have created the boot installer for Mac OS 10.12, you can boot from any compatible Mac with it by doing the following: Connect the macOS Sierra boot drive to the Mac Reboot the Mac and immediately hold down the OPTION key Choose “Install macOS Sierra” from the boot menu options. Unfortunately, Disk Utility in macOS High Sierra doesn’t make that option easy to find. Formatting a drive so you can install and boot macOS requires the GUID partition map. When you’re sure, click the “Erase then create the disk” button (see below). Select the disk volume for your boot disk, then click “Choose this disk” This is your last chance to make sure that you really want to erase the disk and turn it into a bootable drive.