: Windows Defender or third-party antivirus programs often lock the drive to scan it immediately upon insertion. Active File Explorer Windows
Before writing a DMG file, right-click the drive inside TransMac and choose Format Disk for Mac . This breaks the Windows file structure cleanly.
Before diving into the issue, let's briefly discuss what Transmac is. Transmac is a popular software tool for Mac and Windows users that allows them to access, read, and write files on external hard drives or USB drives formatted for Mac on a Windows computer. It's an essential utility for users who need to transfer files between Mac and Windows systems. Transmac Drive Has Been Locked By Another Program
Follow these steps in order to release the lock and successfully use TransMac:
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. : Windows Defender or third-party antivirus programs often
. This wipes the partition table, often bypassing software locks. create partition primary
When using TransMac to format a drive or restore a DMG image, you may encounter an error stating the drive is or that it could not access disk/media . This typically happens because Windows background processes are actively monitoring or protecting the USB drive, preventing TransMac from gaining exclusive low-level access. Top Reasons for Drive Locking Before diving into the issue, let's briefly discuss
If the drive remains locked, follow these procedures to force Windows to release it:
Windows File Explorer is the most common cause of this error. The moment you plug in a USB drive, Explorer attempts to read it, assign a drive letter, or index its contents. Press Ctrl + Shift + Esc to open . Click More details if you are in the compact view. Scroll down the Processes tab to find Windows Explorer . Right-click Windows Explorer and select Restart .