"Unable to detect operating system" Guest OS macOS

[KeithR1]

2018 MacBook Pro macOS Ventura 13.3
Parallels Desktop v17.1.16
Guest OS X Mountain Lion 10.8

I have some legacy software that integrates with hardware. I need to run 10.8 or less.

Parallels message "Unable to detect operating system" when I try to install OS X Mountain Lion 10.8. If I continue it still fails.

I have download directly from Apple the InstallMacOSX.dmg multiple times.
Mountain Lion 10.8

In my research, I noticed this predates the Contents/SharedSupport/InstallESD.dmg layout of newer installers.

The installers located in 'Packages' folder with Essentials.pkg being the largest at 1.8GB

 

[Pavel Merkulov]

2018 MacBook Pro macOS Ventura 13.3
Parallels Desktop v17.1.16
Guest OS X Mountain Lion 10.8

I have some legacy software that integrates with hardware. I need to run 10.8 or less.

Parallels message "Unable to detect operating system" when I try to install OS X Mountain Lion 10.8. If I continue it still fails.

I have download directly from Apple the InstallMacOSX.dmg multiple times.
Mountain Lion 10.8

In my research, I noticed this predates the Contents/SharedSupport/InstallESD.dmg layout of newer installers.

The installers located in 'Packages' folder with Essentials.pkg being the largest at 1.8GB

Hello,

Thank you for your feedback.

To let us better understand the situation, please perform the following steps:

1. Run your virtual machine and reproduce the issue.

2. Collect a technical report (click on the Parallels icon > Help > Send technical data > check "Attach screenshots..." > press Send Report) and send the report's 9-digit ID in a reply.