!!better!! — Transmac Drive Has Been Locked By Another Program

port instead of 3.0, as some older DMG writing processes are more stable on 2.0. Trial Expired

Type list disk to find your USB drive's number (e.g., Disk 2).

Before jumping into fixes, it’s crucial to understand the mechanics. Windows uses a file locking mechanism to prevent data corruption. If Program A is reading or writing to a drive, Windows tells Program B (Transmac) that the drive is "busy" or "locked."

Method 3: Temporarily Disable Antivirus and Windows Defender Transmac Drive Has Been Locked By Another Program

Wipes the partition table entirely, removing any OS-level locks.

Type select disk X (replace with your actual USB drive number) and press Enter .

Windows Defender or third-party antivirus programs often block low-level disk modifications to prevent malware. port instead of 3

Windows Explorer often automatically attempts to index or generate thumbnails for files on newly connected drives. If the drive contains a file system recognizable to Windows (such as FAT32 or exFAT partitions often found on bootable drives), Explorer keeps an open handle on the drive letter. This prevents TransMac from locking the physical drive.

Right-click the TransMac icon and select Run as Administrator . Without elevated permissions, TransMac often fails to override system locks.

Understanding and Fixing the "TransMac Drive Locked" Error When using TransMac to create bootable macOS installers or manage Apple-formatted drives on Windows, users frequently encounter the error: "The drive has been locked by another program." Windows uses a file locking mechanism to prevent

You are trying to flash a macOS DMG file to a USB drive on Windows, but TransMac stops you with a frustrating error:

If another program is using the drive, you may need to force it to close. Right-click the taskbar and select .

If the drive remains locked, you can use the Windows command-line utility