However, last time I create bootable USB for macOS 10.15 Catalina with TransMac, it worked. I remembered with macOS Sierra, the TransMac was not responsive to creating bootable USB on Windows. To create a bootable USB Flash Drive for macOS 10.15 Catalina on Windows, you have to download the TransMac and macOS 10.15 Catalina dmg file. Create bootable USB for macOS 10.15 Catalina That’s why I have directly moved to the next step. I’m assuming you have already installed and configured the drivers of Windows 10. 3 How to Configure Bootloader and Post Installation of macOS Catalina?.2 Install macOS 10.15 Catalina on PC- Hackintosh.1 Dual Boot Windows 10 and macOS Catalina on PC- Hackintosh.