Please do not advertise Transmac as it does not work and cannot create bootable MacOS USB. It is the Mac equivalent of an ISO file that has been in use since Apple transitioned from the IMG format with Mac OS X. Method 2: Using PowerISO This will probably take 20 to 40 minutes, though it may take longer, depending on the speed of your USB drive. To do this, you’ll need to use the Diskpart command-line … Before you can use TransMac, you first need to partition your USB flash drive with a GPT partition, as a normal MBR partition may not work. By doing this, you can always go back to your working installation. Click the Yes button when you see the warning message on your screen that the drive will be erased.
It's one of the quickest methods to create macOS bootable USB drive from dmg file.
