Before looking for a license key, remember that TransMac comes with a fully functional 15-day trial You can get the latest version directly from the official download page No Key Required:

After purchase, you receive a name and a serial code. You simply click "Enter Key" in the TransMac startup splash screen, input your details, and the software is fully unlocked. 2. The Trial Reset (The Temporary Fix)

If your trial has expired and you just need to flash one more drive, try BalenaEtcher . It’s free, safe, and handles files very well without needing a license key. Are you trying to create a bootable macOS USB , or do you just need to copy files off a Mac drive?