Log in to Ambari.

Browse to Admin > Stack and Versions.

Click on the Versions tab.

Click Install Packages and click OK to confirm.

The Install version operation will start and the new version will be installed on all hosts.

After installation is complete, you will see the Perform Upgrade button. Do not click the Perform Upgrade button. You will be performining this upgrade manually instead.

Proceed to Preparing to Upgrade.