Method 1: Download macOS Catalina DMG via Official Apple Links
Note: Running macOS on non-Apple hardware via VMs can be resource-intensive. Ensure your PC has at least 8GB of RAM (16GB recommended) and a capable processor.
Convert the final image from a .cdr format into a universal .iso format:
mv ~/Desktop/Catalina.iso.cdr ~/Desktop/Catalina.iso ⚠️ Important Compatibility Notes
A: A complete macOS Catalina installer is usually between 8 GB and 9 GB. For example, a DMG file for macOS Catalina 10.15.7 (19H2) is reported to be approximately 7.71 GB.