Transmac Drive Has Been Locked By Another Program !link! Review

The "Drive has been locked by another program" error in TransMac typically occurs when a Windows process—such as File Explorer, an antivirus, or disk management service—is actively accessing or monitoring the USB drive, preventing TransMac from gaining the exclusive control needed to format or write to it.  Immediate Solutions 

5) Check for mounted images (macOS/Windows)

• macOS: Open Disk Utility or Finder — unmount/dismount the DMG.
• Windows: In File Explorer or via an imaging tool, right-click the virtual drive → Eject.

Ryan looked up from his screen, concerned. "Oh no, what do you mean?" Transmac Drive Has Been Locked By Another Program

If TransMac continues to fail, other tools can create bootable macOS installers from DMG files on Windows: The "Drive has been locked by another program"

If you manage to bypass the lock but the drive isn't recognized by the Mac, ensure you are formatting it as GPT (GUID Partition Table) rather than MBR, as most modern Macs require GPT to boot. If you're still stuck, tell me: version of macOS are you trying to burn? What is the brand and size of your USB drive? Are you using a or a direct port on your PC? macOS: Open Disk Utility or Finder — unmount/dismount