This article will walk you through the steps you need to take if macOS Monterey doesn’t install properly. Start in order, as the steps become more complex as you work your way down the list and the suggestions at the top are more likely to help you right away.

There could be many reasons why your Mac is showing an “Installation Failed” error when you try to upgrade to macOS Monterey. These include:

If you've received an "Installation failed" message while attempting to upgrade to macOS Monterey, it may be a little scary, but don't panic. There are a number of steps you can take to get the installation going again, and if that doesn't work, you may be able to return to the state your computer was in before you began.

Make sure your computer is compatible with macOS Monterey. Not all Mac computers have the resources to run macOS Monterey. Check your machine’s compatibility using the link above.