Transmac Drive Has Been Locked By Another Program Jun 2026

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 .

By following these steps, you should be able to bypass the "Transmac Drive Has Been Locked By Another Program" error and successfully manage your HFS+/APFS drives. If you’re still having trouble, Are you using an drive?

A simple, open-source tool often more resilient to background locks.

Right-click any process using that drive and select . Alternative if TransMac Still Fails Transmac Drive Has Been Locked By Another Program

: Services that monitor for new hardware or media files can interfere with the write process. Step-by-Step Resolution Guide 1. Run TransMac as Administrator

While primarily used for Windows ISOs, changing the boot selection drop-down to "All files" allows you to select and flash a DMG file to a USB drive. If you want to troubleshoot this further, let me know: What version of Windows are you using? What macOS version is the DMG file you are trying to write? Have you tried another USB flash drive ? Share public link

First, try the simplest solutions to release the lock. The "Drive has been locked by another program"

To resolve the lock, the user must systematically identify the process holding the handle and terminate it.

Ryan chuckled. "Definitely a valuable lesson. And I'm glad I could help you out of that sticky situation."

Open the Start menu, type , and press Enter . Click on Virus & threat protection . A simple, open-source tool often more resilient to

Right-click the Start button and select or Command Prompt (Admin) . Type diskpart and press Enter .

Windows File Explorer often locks unformatted or Mac-formatted drives because it tries to read them and fails, creating a loop that holds the lock. Press to open the Task Manager . Click More details if you are in the compact view.

As they both sat back down at their desks, Emily turned to Ryan and smiled. "Well, I guess that's one way to learn about file management."