No specific info about version 15.2. Please visit the main page of Install macOS Catalina on Mac Informer.
Create a bootable USB key from OS X 10.9 to macOS Catalina 10.15.
Build a bootable drive from OS X/macOS installer program.
Install and run macOS Catalina on your unsupported Mac.
Install macOS Mojave on unsupported Mac computers.
Install macOS Sierra on unsupported computers.
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