If you use pkgutil to expand the InstallMacOSX.pkg it opens to three items, the Distribution file, InstallMacOSX.pkg and Resources. You can alter the Distribution file to ignore the supported platform check, see below.

• Convert Pkg To Dmg. A.DMG file is the disc image file used by MAC OSX. It is an exact copy of a hard disk or compact disk. The DMG file can be burned to a CD or mount as a normal volume on Macintosh computers. Usually, the data in DMG file is stored in compressed format.
• The standard pkg and the seemlingly standard (but not) dmg. The pkg option will build a standard pkg installer file, which will install with any system that can install pkg files. The dmg option will build a standard dmg disk image file, with the payload of the installer as contents. On its own, however, this dmg cannot do anything.

Creating the Install OS X El Capitan.app on a mac that came with a newer OS than El Capitan.

For some reason, if you want macOS in.DMG or.ISO format, there is a method to convert the.app file. The PKG files contain compressed installer files that are used to install Mac software applications onto a user's hard drive. Oftentimes PKG files will also be used to update NeXT installer packages.

Download the InstallMacOSX.dmg from Section 4 of How To Upgrade To El Capitan

Double-click to open InstallMacOSX.dmg to Install MacOSX.pkg.

Drag InstallMacOSX.pkg to the Desktop.

Open Terminal, enter the text

A folder will be created on the Desktop after a while with the contents of the .pkg file.

In there you will see an item called Distribution, Control-click on that and select Open With

go to Other and select Text Edit.

When the file opens scroll down to the section that reads,

function isSupportedPlatform(){

type in at the end return true; so it now reads as,

function isSupportedPlatform(){return true;

Now click Save and close the document.

Go back to Terminal and enter the text,

press Return, after several minutes, be patient, (check to see if the prompt has returned to Terminal) a new package will be created on the Desktop.

When created double-click on that and an installation window will open where you will now convert the

new InstallElCapitan.pkg to the Install OS X El Capitan.app which will be placed in your Applications folder.

You can now create a bootable USB using the install app and createinstallmedia,

Pkg Dmg Validation Has Failed

If you have the time I would be grateful if you could give this a trial, it works here on my mac, but I would like confirmation from yourself or any others reading this that the procedure works on macs that came with macOS Sierra or newer pre-installed. Oh and tell me if my description of the procedure is easy to follow and understand..

How To Convert Pkg To Dmg

Jan 15, 2020 12:58 AM

Pkg To Dmg Online