Use the App Store or Terminal as mentioned above.
for a virtual machine (like VMware or VirtualBox) and cannot create one yourself, the Internet Archive Macos Catalina 10.15.7 Iso Download --39-LINK--39-
Once you have created a bootable USB drive with MacOS Catalina 10.15.7 ISO, you can install the operating system on your computer. Use the App Store or Terminal as mentioned above
macOS Catalina 10.15.7 remains a vital piece of software for the Mac ecosystem, bridging the gap between legacy 32-bit app support (which ended with Mojave) and the modern era of macOS. While ISO files are the most versatile way to deploy this OS, the safest route is always to generate the image from official Apple sources to ensure a secure and stable computing experience. Macos Catalina 10.15.7 Iso Download --39-LINK--39-