Resource busy Failed to mount the InstallESD.dmg from. Closed vitalymak opened this issue 5 comments Closed. MacOS Sierra 10.12.4 Failed to mount the InstallESD.dmg #25. GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Apple may provide or recommend responses as a possible solution based on the information provided every potential issue may involve several factors not detailed in the conversations captured in an electronic forum and Apple can therefore provide no guarantee as to the. This site contains user submitted content, comments and opinions and is for informational purposes only.