The bad news is this error could be occurring due to a number of reasons. The good news is you can get your Mac back up and functional with a little work.
What Causes the ‘macOS Could Not Be Installed’ Error?
Several issues could cause the problem. However, the error screen should give you some idea of what’s gone amiss. Here are some messages you might see underneath the warning:
The pat /System/Installation/Packages/OSInstall.mpkg appears to be missing or damaged.An error occurred installing macOS.Unable to unmount volume for repair.Storage system verify or repair failed.An error occurred while verifying firmware.
Some of these offer more information than others, but they point to different stages of the installation that failed. The following steps and fixes should sort out any of the problems mentioned above.
How to Fix the ‘macOS Could Not Be Installed’ Error
Fixing the “macOS Could Not Be Installed” error may require some patience. It’s best to start with the simple fixes, which often solve the problem, but if they don’t, you have other options. Here are the approaches to try.
Still Need Help?
If none of the above worked, it may be time to turn your computer over to the professionals. Check out our guide on how to get your computer fixed for instructions on finding someone to solve the problem and what you need to do to prep your Mac for service. Hover your mouse over the white space to the right of this bar to learn how much space is free. If it seems low, move some nonessential files off temporarily to see if that lets the installation proceed.
