Open the DMG file. Inside, you'll typically find a .pkg file. Double-click the .pkg file and follow the on-screen instructions to install the "Install macOS Catalina" app into your "Applications" folder.
Do you plan to install this on a or inside a Virtual Machine ? What is the exact model year of the destination computer? Share public link
Use Apple’s built-in tool to write the installer files into the mounted disk image: download macos catalina 10157 dmg file hot
While Apple does not publicly offer a full .dmg installer for Catalina, several trusted third‑party archives have preserved the final 10.15.7 build (internal build number 19H2). One widely referenced source provides a direct download with full checksums for verification:
Before flashing your target device, confirm your Mac belongs to the native support matrix for version 10.15: Mac Model Series Minimum Supported Production Year Early 2015 or newer MacBook Air Mid 2012 or newer MacBook Pro Mid 2012 or newer Mac Mini Late 2012 or newer iMac Late 2012 or newer iMac Pro 2017 (All models) Mac Pro Late 2013 or newer Open the DMG file
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Yes, the update packages are still hosted on Apple‘s CDN and remain accessible via the direct links provided in this article. However, the full installer is no longer prominently listed in the Mac App Store. Do you plan to install this on a or inside a Virtual Machine
If you are already on a Mac running macOS Mojave 10.14.6 or later, you can download the full installer directly to your Applications folder without using the App Store: Apple Support (found in Applications > Utilities). Type the following command and press Enter:
For Hackintosh users, custom DMG images are also available that include pre‑configured bootloaders (Clover or OpenCore). One popular resource offers several variants: