When upgrading your macOS operating system, encountering an error message like “startosinstall could not get license agreement” can be frustrating. This error indicates that your Mac is having trouble downloading the necessary software license agreements needed to install the new operating system.

If you`re experiencing this issue, there are a few steps you can take to try and resolve it:

1. Check your internet connection. A weak or unstable internet connection can cause issues with downloading the necessary agreements. Make sure you have a strong and stable internet connection before attempting to upgrade your macOS.

2. Restart your Mac. Sometimes a simple restart can fix issues with software installation. Try restarting your Mac and then attempting the upgrade process again.

3. Clear your cache. Clearing your cache can also help fix issues with downloading software agreements. To clear your cache, open the Terminal app (found in Applications > Utilities) and type in the following command: sudo rm -rf /Library/Preferences/com.apple.SoftwareUpdate*

4. Try a different network. If you`re still having trouble downloading the necessary agreements, try connecting to a different network (for example, a different Wi-Fi network or a wired connection).

5. Contact Apple support. If none of these steps work, it`s best to contact Apple support for help troubleshooting the issue.

In conclusion, encountering the “startosinstall could not get license agreement” error message when upgrading your macOS can be frustrating, but there are steps you can take to try and resolve the issue. By checking your internet connection, restarting your Mac, clearing your cache, trying a different network, or contacting Apple support, you may be able to successfully upgrade your operating system.