To remove all the package installed within a package group, uncheck the checkbox beside it. To remove individual packages, click the Details button beside the package group and uncheck the individual packages.
When you are finished selecting packages to remove, click the Update button in the main window. The application computes the amount of disk space that will be freed as well as the software package dependencies. If other packages depend on the packages you selected to remove, they will be automatically added to the list of packages to be removed. Click the Show Details button to view the list of packages to be removed.
Click Continue to start the removal process. When it is finished, an Update Complete message will appear.
You can combine the installation and removal of packages by selecting package groups/packages to be installed/removed and then clicking Update. The Completed System Preparation window will display the number of packages to be installed and removed.