Security software often "hooks" into a USB drive the second it's plugged in to scan for malware, creating a lock.
: While primarily for Windows/Linux, it can handle some bootable media tasks. Further Exploration
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.
Disk Management, Diskpart, or another partitioning tool is currently accessing the drive. Transmac Drive Has Been Locked By Another Program
The error "TransMac Drive Has Been Locked By Another Program" is a manifestation of the Windows operating system's security and file handling protocols.
Often, simply having a folder open for the USB drive causes the lock. Close all open Windows Explorer windows. Unplug the USB drive. Wait 10 seconds and plug it back in. Immediately attempt the TransMac operation. 3. Use Diskpart to Clear the Disk (Recommended)
Temporarily disable Windows Defender or your 3rd party antivirus (McAfee, Avast, etc.). Security software often "hooks" into a USB drive
TransMac requires low-level hardware access that standard user accounts don't always have. Run as Admin : Right-click the TransMac shortcut and select Run as administrator Check Write Protection
typically occurs because a background process in Windows is actively monitoring or holding a handle on the USB drive, preventing TransMac from gaining the exclusive access required for low-level formatting or writing. Common Causes of Drive Locking Security Software : Antivirus programs like Windows Defender
Type clean and press . This erases the partition table and forces Windows to drop all locks. Disk Management, Diskpart, or another partitioning tool is
utility is the most effective way to break a software lock by wiping the drive's partition table. Start Menu , right-click it, and select Run as Administrator and press Enter. to find the number of your USB drive (verify by size). select disk X with your drive number). to remove all partitions and locks. : If the drive still refuses to work, type create partition primary and format it as in File Explorer before trying TransMac again. 3. Temporarily Disable Real-Time Protection
The error message "TransMac Drive Has Been Locked By Another Program"
If TransMac continues to throw the lock error despite your best efforts, the software may be conflicting with a deep-level Windows architecture update. You can achieve the exact same results using free alternative tools that handle drive locking differently: