How to Download macOS Catalina 10.15.7 DMG/ISO File and Full Installer

While the latest macOS version is macOS Sonoma, there might be situations where you still want to use the older macOS Catalina instead. This could be because you need to test apps on it, your Mac is too old to run the latest macOS Sonoma, or simply because you prefer Catalina over the new Sonoma.

This guide will walk you through the process of downloading the macOS Catalina 10.15.7 installer, from the convenience of DMG and ISO files to the full installation package.

Let's get started.

macOS Catalina Installer: DMG File vs ISO File vs Full Installer

• macOS Catalina DMG File: This is a disk image used for installing macOS Catalina directly on your Mac.

• macOS Catalina ISO File: This is also an image file for the macOS Catalina operating system. But, unlike a DMG file, an ISO file is more widely used because it supports not only macOS but also Windows and Linux. When you have a macOS Catalina ISO file, you can use it to create a bootable USB stick or virtual machine using VMware or VirtualBox, allowing you to install macOS Catalina on either a Mac or a non-apple hardware computer.

• macOS Catalina Full Installer: This is a complete package that contains all the required files and resources to install macOS Catalina on a Mac. You can use it to install macOS Catalina directly on your Mac and create a bootable USB drive to install macOS Catalina on another Mac.

How to Download a macOS Catalina 10.15.7 DMG/ISO File

Before You Start

A macOS Catalina DMG/ISO file is approximately 10 GB in size. It's essential to ensure that your Mac has enough storage space available. If you're looking to quickly clean up your Mac, you can give BuhoCleaner a try. It's one of the best Mac cleaners on the market, and so far, it has gained over 100,000 loyal users from 150 countries.

Download macOS Catalina 10.15.7 DMG/ISO Files for FREE

While you can create a macOS Catalina 10.15.7 DMG or ISO file yourself, it can be time-consuming and complicated. We have searched, tested, and finally listed some useful download links to help you quickly obtain the desired file.

• Download macOS Catalina DMG Files:

  • macOS Catalina 10.15.7 dmg from MediaFire (8.3 GB)

  • macOS Catalina 10.15.7 VMDK by GEEKRAR.com .vmdk (7.74 GB)

  • macOS Catalina DMG by Geekrar.rar (7.2 GB)

• Download macOS Catalina ISO Files:

  • macOS Catalina ISO 10.15.7 ISO from archive.org (8 GB)

  • macOS Catalina VMDK 10.15.7 by techrechard.com (7.4 GB)

  • macOS Catalina ISO 10.15.5 ISO from archive.org (8.3 GB)

Related Article: [FREE] How to Convert DMG to ISO for Windows and VirtualBox

How to Download a macOS Catalina 10.15.7 Full Installer

Before you download the macOS Catalina full installer, ensure that your Mac is compatible with macOS Catalina.

Here are the Macs that support macOS Catalina:

• MacBook (2015 and later)
• MacBook Air (2012 and later)
• MacBook Pro (2012 and later)
• Mac Mini (2012 and later)
• iMac (2012 and later)
• iMac Pro (2017 and later)
• Mac Pro (2013 and later)

How to Download the macOS Catalina 10.15.7 Full Installer with the App Store

Once you've verified that your Mac is supported, you can go to the App Store to download the macOS Catalina full installer.

1. Click this download link and click the Open App Store button.
2. Click the Get button. (If your Mac is not compatible with macOS Catalina, the "Get" button will be greyed out.)

   

3. Click Download.

   

4. Once the download process is complete, you will find an Install macOS Catalina app in the Applications folder.

   

Now that you have the macOS Catalina 10.15.7 installer, you can use it to create a bootable USB stick for macOS Catalina.

How to Download macOS Catalina Full Installer without the App Store

You may be wondering if it is possible to download macOS Catalina without the App Store. The answer is yes, and you can use Terminal to do that.

Here's how:

1. Open Terminal.

2. Copy and paste the following command into the Terminal window and press Enter.

   softwareupdate --fetch-full-installer --full-installer-version 10.15.7

3. Wait for the downloading process to complete and then quit Terminal.

   

How to Download the macOS Catalina 10.15.7 Installer with Mist

If neither the App Store nor Terminal works for you, Mist is here to help. It’s a free, open-source macOS installer tool that allows you to download macOS installers from OS X Lion (10.7.5) to macOS Sequoia.

Here's how to use Mist to download the macOS Catalina 10.15.7 installer:

1. Click the download link below to download Mist to your Mac.

   Download Mist

2. Install and open it, then wait for the refreshing process to finish.

   

3. Click Installers, locate macOS Catalina, choose a version, and click the download icon.

   

4. When prompted, click Continue > Install to install the Mist Privileged Helper tool.

   

5. Once finished, click the download icon again, choose Continue, select where to save the macOS Catalina installer and the export types you need (application or disk image), and click the Save button.

   

6. Wait for the download process to finish.

   

FAQs

Can I Get macOS Catalina on My Mac?

It depends on whether your Mac is compatible with macOS Catalina.

Why Can't I Find the Downloaded macOS Catalina Full Installer on My Mac?

This may be because your Mac is running macOS Catalina. To find the Install macOS Catalina app in your Applications folder, try downloading the full installer on another Mac that supports macOS Catalina.

How to Create a Bootable USB macOS Catalina Installer?

1. Prepare a USB drive at least 16 GB.
2. Download a macOS Catalina full installer.
3. Run sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume in the Terminal. (Remember to replace MyVolume in the command with the name of your USB drive.)
4. When the Terminal says "Install media now available at "/Volumes/Install macOS Catalina", quit the Terminal and your USB stick.