The “macOS could not be installed on your computer” error is one of the last things you want to see. It appears when you try to update your Mac’s operating system but are unable to complete the operation. Despite its wording, this doesn’t mean your installation will never work. It just means that it failed that one time.

The bad news is that this error can occur for a number of reasons. The good news is that with a little work, you can get your Mac up and running again.

There could be multiple causes for the problem. However, the error screen should give you an idea of what went wrong.

Below are some messages you may see below the warning: