The “Can’t install macOS on your computer” error is something no one wants to see. Occurs when updating the Mac’s operating system fails.
What causes the “Cannot install macOS” error?
There are several issues that can lead to this problem. Start with the hints.
Here are some of the messages you might see below the warning:
Pat/System/Installation/Packages/OSInstall MPKG seems to be lost or damaged. An error occurred while installing macOS. The volume cannot be detached for repair. The storage system fails to be verified or repaired. An error occurred while validating the firmware. They point to different stages of the failed installation. The following steps and fixes should fix any of the problems mentioned above! []
How to fix the “Cannot install macOS” error. Here’s how to try it.
Reboot and try the installation again. I won’t explain that. Check the date and time Settings. If the date and time displayed don’t match reality, this could be a problem. Restart your Mac again and go to System Preferences > Date and Time. Click the lock icon and enter your password (if necessary) to enable the changes. Then click Auto Set date and time. After that, try the installation again to see if it works.
Free up space. In some cases, macOS cannot be installed because there is not enough hard disk space. To see the available capacity, click the Apple logo and select About This Mac > Storage. You will see details on your computer. Hover your mouse over the space to the right of this column to see how much space is available. If it looks low, close some non-essential files temporarily to see if you can continue with the installation. Delete the setup program. Find the macOS installer in the Finder’s downloads folder and drag it to the wastebasket. Then, download it again and try again. Reset NVRAM. This small piece of memory stores basic information, such as the time, the display resolution, and which disk to boot from. You may need to go back to System Preferences to toggle over any Settings that have been changed, but you can try the installation again before that to make sure the problem is resolved. Restore from backup. If you use Time Machine to regularly back up your Mac, you can use recovery mode to return to an earlier state to see if it is more compatible with the installer. Make sure your backup drive is connected. Then, restart the computer and hold Command + R until the Apple logo appears. Instead of going to the desktop, your computer will prompt you to select a major language and open a window called macOS Utilities. In the macOS utility, click Restore from Time Machine Backup. Then, click Continue. You will * an intermediate screen that contains some information about what you are going to do. Click Continue to continue. Select the drive where you store the backup, and then click Continue again, which will take you to a screen where you can select the most recent backup. After that, click Continue again. Your computer will restore the earlier backup, and you can see if the installation worked. Run disk emergency. This may be helpful if you receive a “volume cannot be installed” error. First aid check internal hard drive and make any repairs. It can even install volumes after completion. You can then try the installation again.