Open the TransMac, and select Run as administrator. And we are going to tell you something straightforward – backup if things are stored in USB Drive. Plug the USB drive into your Windows computer that you’ll be using to fix your MacOS. If you like the software and to support the developer you can buy the full version. It’s paid software with a 15-day trial, so you can use it within the time to create a bootable macOS USB flash drive. Download and install TransMac on your Windows PC.