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How to Fix “error verifying firmware” issue while installing macOS High Sierra

Earlier this year, Apple announced the Macos High Sierra at WWDC 2017 which was released officially later on September 25. An upgrade over the previous macOS Sierra, the High Sierra with version 10.13 came off as a significant and improved OS that promised to make the Mac more reliable, capable and responsive. With High Sierra, the new Apple File System (APFS) replaces the age-old HFS file system, with an advanced 64-bit architecture that claims to be more safe, secure, and responsive for modern storage Macs, featuring all-flash storage and solid state drives.

macOS high Sierra

High Sierra also includes new HEVC ((High Efficiency Video Coding, aka H.265) format for videos that offers up to 40 percent better compression than the standard H.264 format. With this new codec, videos stream better and take up less space on your system. Metal 2 with capabilities like machine learning, virtual reality, and external GPU support has been introduced to deliver next-generation graphics. In addition to these, several existing apps have been refined with new features and tools to offer a great experience. These include Photos, Safari, Mail, Siri, Notes, Spotlight, and iCloud.

Coming to the point, several users are facing a problem while upgrading their Mac to macOS High Sierra. To be precise, the installation process simply stops with the message “macOS could not be installed on your computer“. Are you experiencing the same problem and seeing an error that says “An error occurred while verifying firmware. Quit the installer to restart your computer and try again.”? Don’t worry, you aren’t alone as several users including me encountered the exact same issue.

macOS could not be installed on your computer. An error occurred while verifying firmware.

This error could arise if you’re using a third-party SSD on your Mac and in our case, it’s a Samsung Evo 250GB SSD. Regardless of the reason, it’s literally very easy to overcome this ‘error verifying firmware’ issue and normally proceed with the High Sierra installation on a compatible Mac. Before proceeding, make sure to backup all your important data or better perform a Time Machine backup.

Solution:

  1. Reboot into Safe Mode – To do so, restart the Mac and hold the Shift key while restarting. To ensure you’re in the safe mode, simply navigate to About This Mac > System Report > Software. The ‘Boot Mode’ should say Safe.
  2. Initiate the installation while you’re in safe boot mode – Go to the Applications folder and double-click on the “Install macOS High Sierra” app.
  3. The install should go seamlessly without any issues and the entire process should take around 45 to 50 minutes. During the process, the system will reboot several times.

macOS high sierra installation process

Post installation, you can verify the macOS version from ‘About This Mac’ and check the new APFS file system in ‘Disk Utility’.

APFS file system on High Sierra

That said, our MacBook Pro (Early 2011) has no problems with the new file system and Windows 10 with Bootcamp NTFS file system continues to run fine as well.

Tip via [Apple Developer Forums]

The post How to Fix “error verifying firmware” issue while installing macOS High Sierra appeared first on WebTrickz.



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