Working with Mac OS

How to Create macOS Catalina ISO File: 3 Step Easy Guide

In this article, we will show you How to Create macOS Catalina ISO File. You can use macOS Catalina ISO File to Install macOS Catalina on VMware or install macOS Catalina on VirtualBox.

For installing macOS Catalina on a virtual system, the first and most crucial step would be to get macOS Catalina ISO available online but does not guarantee getting the job done. Those ISOs are not entirely functional, and also, perhaps there is another problem with it. In cases like this, you would need to Create a macOS Catalina ISO File on your own and then use it to Install macOS Catalina on VMware or install macOS Catalina on VirtualBox. So, let us dive in with this guide to How to Create macOS Catalina ISO File.

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This method on How to Create macOS Catalina ISO File is straightforward. The main install of macOS Catalina (.app) can be directly downloaded from your App Store or Apple’s Beta Software Program. After we have the installer file, we will apply some commands on Terminal to Create macOS Catalina ISO File.

How to Create macOS Catalina ISO File: 3 Step Easy Guide

Step 1– Download macOS Catalina Installer From App Store (.APP)

Simply go to your App Store and search macOS Catalina; you simply follow this link. Click Get and wait for the installer to download the file.

Download macOS Catalina Installer

After the file is download, do not install the file and close the installer by clicking Quit Install macOS.

 Quit Install macOS

Step 2– How to Create macOS Catalina ISO With Terminal

Firstly, we need to check if the macOS Catalina Installer file (.app) has been downloaded correctly. To check this, go to your Application folder and look for the installer file.

Now open you launchpad, and click Terminal.

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Open Terminal on Mac

Step 3- Execute the Commands in Terminal

Command 1: This command is used to create a DMG file:

hdiutil create -o /tmp/Catalina -size 8500m -volname Catalina -layout SPUD -fs HFS+J

Command 2: This command is used to mount the created Catalina DMG disk image:

hdiutil attach /tmp/Catalina.dmg -noverify -mountpoint /Volumes/Catalina

Command 3: This command is used to create the macOS Catalina installer application on the mounted volume:

sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/Catalina --nointeraction

Command 4: This command is used to unmount the volume you just created:

hdiutil detach /volumes/Install\ macOS\ Catalina

Command 5: This command is used to convert the DMG disk image file to an ISO disk image file (technically a CDR file but it’s the same as an iso)

hdiutil convert /tmp/Catalina.dmg -format UDTO -o ~/Desktop/Catalina.cdr

Command 6: This command is used to rename the Catalina CDR file extension to Catalina ISO to convert the CDR to ISO:

mv ~/Desktop/Catalina.cdr ~/Desktop/Catalina.iso

After all the commands are executed, you can see the macOS Catalina ISO file on the desktop as shown in the snapshot.

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Conclusion:

Now, all the steps of How to Create macOS Catalina ISO File are complete, and you finally have a fresh and working macOS Catalina ISO File. If you want to ignore all this fuss, you can Download macOS Catalina ISO file from this link. We have added successfully tested macOS Catalina ISO files.

You can also use this guide to Create macOS Catalina Bootable Installer for Fresh Installation: 2 Easy Steps (With Installation Steps).

Now, you can use this macOS Catalina ISO File to Install macOS Catalina on VMware or install macOS Catalina on VirtualBox.

This is the perfect and working ISO image of macOS Catalina and can be used everywhere.

And that’s all to there it is. If there’s something remaining, let me know in the comment down below.

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