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Download dmg from app store
Download dmg from app store










download dmg from app store

Now the hard disk service program only needs a few minutes to create the DMG and our handy macOS Catalina installer is ready, which can also be shipped via Dropbox or other services. At this point we select our new directory on the desktop where the Catalina installer is located. Here you will be asked for the folder from which the DMG is created. Next, open that Disk Utility and choose File > New Image > Image from Folder in the top left. I would only do without periods and special characters in the file name so that there are no problems on other operating or file systems.

download dmg from app store

I named the folder macOS Catalina Installer 10-15, but you can be creative here. If you want to leave a copy in the Applications folder, hold down the ALT key during the drag-and-drop process. To do this, we create a new folder on the desktop and drag the "macOS Catalina Installer" into it. Instructions: Create DMG image from folder We copy the installer from the programs folder into a new directory that we created on the desktop. But you can save yourself the step if you copy the Installer.app directly to a USB stick or an external hard drive. We definitely want to package the installer app in a DMG for easier use and shipping in the future.

download dmg from app store

What arrives there only has a few kB and can no longer be used as an installer. You can find out quickly by throwing the “macOS Catalina Installer” into Dropbox, for example. The next step now is to package this app in a DMG so that it is actually a file, because an ".app" file is usually only shown as a single file and is in fact a folder with all the contents, belonging to the app. The file extension ".app" can also be seen in my screenshot (below), because I have the file extensions displayed. Now we go to the "Applications" folder and look for the "Install macOS Catalina" file there. To the right of the apple menu is the menu item that allows you to cancel the installer before making changes to the system.












Download dmg from app store