You can install macOS Sierra through many methods but we highly recommend to create a bootable USB for macOS.
After macOS Sierra, the upcoming version of macOS was up by the name of macOS High Sierra which is also taken from the same name. You may find dubious resources online pointing to third party download links, but those are not recommended to use for a variety of security reasons.ĭid you make a macOS Big Sur DMG? Know of another approach to download an authentic macOS Big Sur DMG file? Let us know your experiences and tips in the comments.And the name of the macOS Sierra was taken from Nevada which is a beautiful place located in Western United States in California. If you were hoping for a direct download link to SharedSupport.dmg / InstallESD.dmg for macOS Big Sur, you’ll find that Apple does not supply one, thus the need to use a method like that detailed above.
The steps outlined above are similar to creating a macOS Big Sur ISO file, except you don’t convert the DMG file to a CDR / ISO.
Now, move the macOS Big Sur DMG file to the user desktop for easy access:Īt this point you’ll have the MacOSBigSur.dmg disk image file on the current users desktop, and you can do with it what you want, whether that’s to import it into a VM, creating a boot utility, or whatever else you’re looking to do. Unmount the newly created volume with the following command:. Sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia -volume /Volumes/MacOSBigSur -nointeraction Next, use createinstallmedia utility to copy the installer files to the disk image DMG file you just created:. Hdiutil attach /tmp/MacOSBigSur.dmg -noverify -mountpoint /Volumes/MacOSBigSur Mount the disk image with the following command:. Hdiutil create -o /tmp/MacOSBigSur -size 16500m -volname MacOSBigSur -layout SPUD -fs HFS+J From the command line, create the disk image DMG file destination and temporary volume by issuing the following command:. 
When the download has finished, open the Terminal application. If you’re already on macOS Big Sur you can re-download the installer with these instructions) Get macOS Big Sur from the Mac App Store (you can download other macOS installers from here if needed. We’re focusing on macOS Big Sur but this approach works with other macOS releases too. We will walk through the process of getting a macOS Big Sur DMG file by building one from the downloaded installer media. Nonetheless, if you’re wanting a macOS Big Sur DMG, here’s how you can get one. For what it’s worth, if you’re looking to create boot media, it’s probably better to simply make a macOS Big Sur bootable install USB drive using the more traditional approach.
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