If the Software Update on a Mac computer fails to update properly or interrupts for any reason, you may be prompted with a "Configuring installation" error that prevents the update from being installed properly. If you wish to reinstall the update, you must delete the files in the "Updates" folder located in the "Library" directory. While you cannot delete the "Library/Updates" folder itself without harming the computer, if you want to delete the files in the "Library/Updates" folder, you can do so easily.
Click the "Finder" icon in the computer's dock, followed by the computer's hard drive listed beneath the "Devices" heading.
Click the "Library" folder icon, followed by the "Updates" folder icon.
Click on the first item in the "Updates" folder, press and hold the "Shift" key and click on the last item in the "Updates" folder to highlight all of the items in the folder.
Click on the highlighted items and drag them into the "Trash" icon in the computer's dock. Right-click on the "Trash" icon and select the "Empty Trash" option from the context menu that appears to delete the "Library/Updates" folder contents.