![]() Step 2: Shortly, you will be booted in the Recovery Mode. Step 1: Reboot macOS and immediately press-hold Command + R simultaneously. Steps to repair a failing Mac hard drive are discussed below: Repair macOS Hard Drive with Disk Utility I'm really hoping it's not fried somehow. I can never get a successfull first aid run on either the main drive or new formatted sub drive. Apple logo with incredibly slow load time then right at the end the spinning reticle and black screen.Įrase the drive and reformat again but it fails at the end saying it cannot be mounted. So I hit restart and it was the same as before. It was stuck on "about a minute remaining" for hours. Long story short now I've erased the boot camp partition using disk utility (now realizing that was a bad thing to do) and erased my main drive and tried to reinstall High Sierra over night. I learned it could be because of spotlight indexing. As soon as I logged in it was horribly slow. So I went back to my mac and instantly the load times were a bit suspect. Windows ran very well and I was satisfied. So I followed some good instructions on how to install it using boot camp and everything went great! When you restart your Mac, you shouldn’t get the extra EFI Boot entry any longer.I've been trying to fix this for a couple of days and have tried to search everywhere will very little progress.īasically my iMac ran great and I wanted to dual boot with Windows 10. In my case, I also have folders called Ubuntu and refind, but I’m leaving those alone.ĭelete the Windows EFI Boot entry by typing this into the Terminal: rm -rf Microsoft You will likely see a folder called Microsoft. This will put you in the directory where your Mac stores information about what operating systems you have installed. Again in Terminal, type: cd /Volumes/EFI/EFI ![]() Once that’s done, you’ll need to navigate to the correct folder. Replace /dev/disk0s1 with the correct partition you located using diskutil. Once you find it, enter these commands one at a time: sudo mkdir /Volumes/EFI sudo mount -t msdos /dev/disk0s1 /Volumes/EFI As you can see, my EFI Boot partition is located on /dev/disk0s1 You’re looking for a partition on your main hard drive called EFI. In the Terminal, type this command: diskutil list This procedure isn’t for the faint at heart, so be careful that you type everything properly.įirst, you’ll need to locate the EFI partition, which is where your Mac stores information about what operating systems can be booted from your Mac. In order to delete the EFI Boot entry when you didn’t use Boot Camp Assistant to delete your Windows installation, you have to do some work in the Terminal. Proceed With Caution – This Procedure Can Render Your Mac Inoperable If You Aren’t Careful Finding the EFI Partition ![]() This procedure should work with all versions of macOS. We don’t need that anymore, so let’s get rid of it. If you’ve manually deleted your Windows partition within macOS, you’re probably noticing that something called EFI Boot still shows up in your Mac’s boot manager. Boot Camp Assistant makes this easy, but sometimes you might forget that the utility can also be used to delete your Windows installation. Being able to install and run Windows on your Mac can be very useful.
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