Downloading diskUtilityPatch 13.0 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. The actual developer of this free software for Mac is Dimosgmx. We recommend checking the downloaded files with any free antivirus.
From the developer:
This app will patch a restriction inside the Disk Utility that prevents it from starting in OS X 10.11 El Capitan. In addition it will patch the binary so that debugMode and advanced-image-options are always enabled on the resulting Disk Utility.app without the need to modify defaults.