/Users/mynamehereyoudontgettoseeitlol/Applications/Install OS X Mavericks.app/ does not appear to be a valid OS installer application.

[MrGlitchWasTaken]

I run the command in the title and it comes up with that error in the title.

[BITespresso]

There are couple of checks done to ensure the installer application is valid. So something seems to be missing or not valid in your case.

In case of OS X Mavericks:

• The provided <path> must be a directory
• The CFBundleDisplayName must be successfully be retrieved from <path>/Contents/Info.plist
• The CFBundleIdentifier must be successfully be retrieved from <path>/Contents/Info.plist
• The CFBundleShortVersionString must be successfully be retrieved from <path>/Contents/Info.plist
• The LSMinimumSystemVersion must be successfully be retrieved from <path>/Contents/Info.plist and have a valid structure
• The directory <path>/Contents/SharedSupport/ must exist
• The file <path>/Contents/Resources/createinstallmedia must exist
• The file <path>/Contents/SharedSupport/InstallESD.dmg must exist
• The file <path>/Contents/SharedSupport/OSInstall.mpkg must exist
• The file <path>/Contents/SharedSupport/InstallInfo.plist must NOT exist
• The file <path>/Contents/SharedSupport/SharedSupport.dmg must NOT exist

I think you should probably try to obtain the OS X Mavericks installer from an alternate source and test again.

[bruh830]

hello... currently having the same issue when trying High Sierra from the App Store... trying to do this for a UTM Virtual Machine. matter a fact, all the ones I've tried: Sierra, high Sierra, and Catalina. none of them have worked so far...

[BITespresso]

@bruh830 You might want to check if your download is actually a full installer application, which should be at least 5 GB. If this is not the case, you need to get a full installer application first:

For newer macOS versions, you can use softwareupdate --fetch-full-installer --full-installer-version <macOS version number> (see: https://discussions.apple.com/thread/253440269?sortBy=rank).

For High Sierra, an option is to use MIST (https://github.com/ninxsoft/Mist) and remove the quarantine attribute from the created installation application (see: #13).

[MrGlitchWasTaken]

@bruh830 You might want to check if your download is actually a full installer application, which should be at least 5 GB. If this is not the case, you need to get a full installer application first:

For newer macOS versions, you can use softwareupdate --fetch-full-installer --full-installer-version <macOS version number> (see: https://discussions.apple.com/thread/253440269?sortBy=rank).

For High Sierra, an option is to use MIST (https://github.com/ninxsoft/Mist) and remove the quarantine attribute from the created installation application (see: #13).

i got a new issue. "failed to create ISO image"