Installation Failed! High Sierra.

Hello everyone,


Today I tried updating my macbook pro (13 inch, mid 2012) to High Sierra. But the installation failed.

I get the following message.

"An error occurred while verifying firmware"

User uploaded file


I tried downloading a fresh copy & retry the installation but still the same error message pops up.

My hard disk is Samsung EVO 850 500GB SSD.


Thanks in advance.

MacBook Pro (13-inch Mid 2012), macOS Sierra (10.12.6), Mid 2012, 16 GB RAM, 500 GB SSD

Posted on Sep 26, 2017 5:16 AM

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Posted on Dec 30, 2017 11:47 AM

My hard disk is Samsung EVO 850 500GB SSD.


That's the reason.


You can see for yourself: "An error occurred while verifying firmware". Apple does not develop firmware for devices they do not incorporate in the products they sell, and they do not consider internal a storage user-replaceable option. In other words you're on your own. Samsung "EVO" SSDs are notorious for that problem and others. It will fail soon enough anyway.


Either replace it with a SSD known to work with macOS, or a conventional hard disk drive. If you want to continue using the Samsung SSD, then restore your Mac from a Time Machine backup and do not upgrade.

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Installation Failed! High Sierra.

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