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Convert MacOS Installer to ISO

Convert MacOS Installer to ISO

Check tutorial of How to Convert a MacOS Installer to ISO

So after a lot of requests from our users here is a guide about How to Convert a MacOS Installer to ISO.

Advanced Mac users may want to convert a MacOS Installer application to an ISO file. Typically, the resulting installer ISO files are used for installing macOS on virtual machines such as VMWare or VirtualBox, but they can also be used to burn the ISO to media to create a boot disk. This also provides an alternative to creating a bootable USB flash drive for MacOS installers.

This one tutorial go through the steps to create a MacOS installer ISO file.

In this particular walkthrough, we will convert a macOS Mojave installer to an ISO file. You can use the same steps to create an ISO file from practically any other macOS installer with createinstallmedia present, including building a macOS Catalina ISO or for Big Sur, High Sierra, and Sierra, simply by replacing the filenames where required.

How to Create a macOS Mojave ISO or Catalina ISO file from an installer

This process requires an installer for macOS and turns it into an ISO file that can be booted or used like a typical disk image file.

  1. First, download the macOS Mojave installer or the macOS Catalina installer (or whatever installer you want to turn into an ISO) from the Mac App Store
  2. When the “Install MacOS Mojave.app” or “Install MacOS Catalina.app” application is fully downloaded and is in the / Applications folder, continue
  3. Then open the Terminal application
  4. Create a buy in DMG file and issue the following command:
  5. hdiutil create -o / tmp / Mojave -size 8500m -full name Mojave -layout SPUD -fs HFS + J

  6. Mount the created DMG disk image as follows:
  7. hdiutil attach /tmp/Mojave.dmg -noverify -mountpoint / Volumes / Mojave

  8. Next, we use createinstallmedia to create the macOS installation application on the mounted volume:
  9. sudo / Applications / Install macOS Mojave.app/Contents/Resources/createinstallmedia –volume / Volumes / Mojave –nointeraction

  10. When createinstallmedia is finished, you can unmount the volume you just created:
  11. hdiutil detach / volumes / Install macOS Mojave

  12. Now we convert the DMG disc image file to an ISO disc image file (technically a CDR file, but it’s the same as an ISO)
  13. hdiutil convert /tmp/Mojave.dmg format UDTO -o ~ / Desktop / Mojave.cdr

  14. Finally, we rename the CDR file extension to ISO to convert the CDR to ISO:
  15. mv ~ / Desktop / Mojave.cdr ~ / Desktop / Mojave.iso

That’s it, now you should have a “Mojave.iso” disk image file on the Mac desktop, which is the macOS installer ISO image.

If you plan to use the ISO file for a virtual machine, you just need to select the Mojave.iso disk image in the virtual machine app as the boot disk, or mount it in the VM like any other disk image would to be. You can also convert ISO files to VDI VirtualBox images if needed.

ISO files are flexible and widely used, they can also be burned to create boot discs and to other media, and you can also copy the ISO to a USB drive using dd or perform any other multitude of actions.

Whether creating an ISO file for the macOS installer and using that ISO is easier than using a bootable USB stick is entirely a matter of use, and in some situations an ISO is the only usable format ( i.e. for certain virtualization scenarios).

Did you manage to create an ISO file from a macOS installer? Do you have a different approach to create an ISO file for macOS installers? Let us know in the comments below.

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How to Convert a MacOS Installer to ISO: FAQ

Tutorial Summary: How to Convert a MacOS Installer to ISO

In this guide, we told you about How to Convert a MacOS Installer to ISO; please read all steps so that you understand How to Convert a MacOS Installer to ISO in case if you need any assistance from us, then contact us.

How this tutorial helping you?

So in this guide, we discuss the How to Convert a MacOS Installer to ISO, which undoubtedly helps you.

What is actual time in which this method complete?

The time to complete the How to Convert a MacOS Installer to ISO tutorial is 10+ minutes.

What are the supported Device?

Apple

What are the supported Operating system?

mac OS


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