(Depending on the version the mac you are using to install, the macOS can vary, a good rule is to install the macOS that is compatible with your mac you are using to install or the current macOS of the mac you are using to install). I didn't search up the macOS on apple store because it didn't pop up, so I typed it on google and clicked on the link from apple and it took me to the apple store and I installed macOS Big Sur and made sure it was compatible to my mac. (You need another mac for this, you can do it on windows, but I couldn't get it to work)Īnd 5:37 to 7:27 is an example of the fix I explained above.
If that method does not work, install a bootable USB that the GB needed can vary depending on the size of the macOS. Then try to install macOS (restart if it doesn't work the first time). A possible fix could be, go to utilites when you are in macOS Utilities (top left of the screen) then click startup security utility, enter password (create a password if you don't have one and restart if it tells you and go back to the utilities), under Secure Boot, click Medium Security and under Allowed Boot Media, click Allow booting from external or removable media. I have an early 2015 macbook air and I had the exact same issue. This issue persists even after erasing the disc using “HFS+ ” as suggested in the comments.Īpple Support has finally asked me to go ahead and create a bootable installer to try and boot from an external device.
I was on call with Apple Support for almost 1.5 hrs today and they were not able to solve the issue. It is not working and fails at the same last step. I've also tried Disk Utility - ran First Aid on the disk and then re-installing Sierra. I have now tried it thrice but I keep getting the same error. It failed at last step of the installation stating “ Error Occurred while Preparing the Installation” error. I restarted the MBA in recovery mode and tried to re-install macOS, after which it did some pre-checks and prompted me to install Sierra Now, when the system restarted it showed a folder with a flashing question mark (?) since it was not able to find anything to boot.
So I erased the Air using the steps provided in the official Apple Support website. I have an early 2015 MacBook Air - which had macOS Monterey installed that I want to exchange with my new Macbook Pro.
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