Transmac Drive Has Been Locked By Another Program |work| Page

"locked by another program"

Fix: TransMac Drive Has Been "Locked By Another Program" Encountering the or "could not access disk" error in TransMac is a common roadblock when creating a macOS bootable USB on Windows. This usually happens because Windows processes—like security software or the File Explorer—are actively "hooked" into the drive, preventing TransMac from gaining the exclusive access it needs to format or write to the media.

1. Click the Safely Remove Hardware icon in the system tray (bottom right).
2. Select your external drive (the one Transmac is trying to access).
3. Wait for "Safe to Remove Hardware."
4. Do not physically unplug it. Simply wait.
5. Now attempt the Transmac operation again.

• If you cannot release the lock because the drive is corrupted or shows I/O errors, stop further writes and consult a data-recovery specialist.
• If TransMac consistently fails with a specific image file, try mounting/extracting that image with alternative tools (7-Zip for some DMG content, or third-party DMG mounters) and contact TransMac support with logs.

Be extremely careful to identify the correct disk.

Type list disk to find your USB drive's number (e.g., Disk 1). Type select disk X (replace X with your drive number). Type clean . This will erase everything on the drive. Once finished, try formatting the drive again in TransMac. Transmac Drive Has Been Locked By Another Program

Why this works: Restarting Explorer releases all file handles to external drives. "locked by another program" Fix: TransMac Drive Has