Error during Mojave installing: The installer could not verify the disk

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Level 1

6 points

Error during Mojave installing: The installer could not verify the disk

Hi!

I'm using iMac (Retina 5K, 27-inch, 2017) (C02TK3HAJ1GG) with MacOS High Sierra (10.13.6)

I have a problem with Mojave installation: system dialog says me, that "The installer could not verify the disk. Open Disk Utility, then run First Aid."

First Aid doesn't help

After running First Aid problem still present.

This is not a single case, two of my colleagues have the same problem and we have at least 150 another iMacs that potentially could have the problem.

Is there some way to update my MacOS to Mojave?

iMac with Retina 5K display, macOS High Sierra (10.13.6)

Posted on Oct 7, 2018 7:08 AM

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Answer 1

Best reply

okoleksii Author

Level 1

6 points

Oct 18, 2018 2:33 AM in response to okoleksii

So, I finally figured out the cause of the problem: on my Mac, I had a separate hard drive and SSD, without a Fusion Drive. This is why the Mojave installer gave me an error.

But in my case, the solution was to make clean install Mojave after I removed my HDD and SSD and made a Fusion Drive. I have not found a way to do Fusion Drive without erasing the disk.

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Answer 2

i_rina

Community Specialist

Oct 8, 2018 2:01 PM in response to okoleksii

Hi okoleksii!

I understand that you're seeing an error message when trying to install macOS Mojave, and I'm happy to help. Please try creating a new user account, then attempt to install again while logged in to the new user account.

How to test an issue in another user account on your Mac

Cheers!

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Answer 3

Oct 8, 2018 10:20 PM in response to i_rina

This doesn't work for me, same error when installing Mojave. Trying a fresh install from a USB drive.

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Answer 4

okoleksii Author

Level 1

6 points

Oct 9, 2018 10:50 AM in response to i_rina

Creating new user account doesn't help, problem still exist. I also have tried to install Mojave after cleaning system memory and in safe mode – the same problem.

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Answer 5

i_rina

Community Specialist

Oct 9, 2018 12:30 PM in response to okoleksii

Hi okoleksii!

Thanks for your reply! At this point, you should contact Apple Support using this link:

Contact Apple Support

Cheers!

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Error during Mojave installing: The installer could not verify the disk

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