Transmac Drive Has Been Locked By Another Program Jun 2026

Once formatted, try the option again. 🚫 Why is this happening?

Remember the golden rule: Windows is trying to prevent data corruption. Once you identify and remove the rogue program, Transmac will work exactly as intended—writing DMGs and formatting Mac drives flawlessly.

While primarily used for Windows/Linux ISOs, newer versions of Rufus can write certain raw image files. You may need to change the file extension dropdown to "All Files" to select your image.

Press Windows Key + X and select or Command Prompt (Admin) . Type diskpart and press Enter . Transmac Drive Has Been Locked By Another Program

Right-click the TransMac icon on your desktop or Start Menu. Select . Try the operation again. 2. Close All File Explorer Windows

Your security software might be interfering with TransMac's low-level access to the drive. As a test, temporarily disable your real-time protection.

Move the flash drive from a front case port to a rear motherboard port (for desktops) or try a USB 2.0 port instead of USB 3.0. Once formatted, try the option again

While TransMac is a fantastic tool, if you consistently encounter issues, it might be worth exploring some alternatives. These programs can perform similar functions and might integrate more seamlessly with your system:

Right-click the on your desktop or Start Menu. Click Run as administrator . Try to format or write to your drive again. 2. Close Windows Explorer (File Explorer)

Other formatting or backup software running tasks. Step-by-Step Solutions to Fix the Error 1. Run TransMac as an Administrator Once you identify and remove the rogue program,

The "Drive Locked" error isn't a bug in TransMac; it’s a security feature of Windows. By , cleaning the disk via cmd , and closing background explorers , you should be able to bypass the lock and successfully create your bootable drive.

This typically happens because Windows—or a background security process—is "protecting" the drive, preventing TransMac from gaining the exclusive access it needs to format it into a Mac-friendly filesystem.

If you cannot resolve the lock, many users find success with balenaEtcher , which often handles drive locking more effectively when flashing DMG or ISO files.

Turn off temporarily while you use TransMac. Use Diskpart to "Clean" the Drive: Open the Start Menu, type cmd , and run it as administrator. Type diskpart and press Enter.