Transmac Drive Has Been Locked By Another Program Hot !!better!! Jun 2026

If you’ve exhausted all solutions and TransMac still claims the drive is locked, try these alternatives (most offer free trials):

TransMac handles APFS with limited write support. For APFS, the “locked” error sometimes means the drive was improperly unmounted from a Mac. Use a Mac to repair it first.

If you connected your drive after launching TransMac, the program might not recognize it properly. TransMac's built-in refresh feature solves this issue.

Try using TransMac. You can the service again once you finish. Top Free Alternatives to TransMac transmac drive has been locked by another program hot

Shut down the Windows Disk Management utility if open.

After executing the clean command, pull the USB drive out of the computer, wait 5 seconds, plug it back in, open TransMac as an administrator, and attempt the image restore again. Reliable TransMac Alternatives

The "TransMac drive has been locked by another program" error usually occurs when , antivirus software , or indexing services are actively using the USB drive , preventing TransMac from gaining the exclusive access it needs to format or write a disk image. If you’ve exhausted all solutions and TransMac still

If you have a File Explorer window open showing "This PC" or the specific USB drive, close it. File Explorer constantly refreshes drive data, which triggers the lock.

If you're getting the "locked by another program" error while trying to "Restore with Disk Image," it’s because a background process has "claimed" the drive. Here is how to fix it:

Type list disk and find the disk number for your USB drive (check the size carefully!). If you connected your drive after launching TransMac,

Click under Virus & threat protection settings . Toggle Real-time protection to Off .

Warning: This process will permanently erase all data on the selected USB drive. Ensure you select the correct drive number. Press the to open the Run dialog box.

If TransMac continues to throw locking errors despite troubleshooting, you can achieve the exact same result using alternative imaging software. is a free, open-source tool that successfully writes macOS .dmg files to USB drives on Windows without the strict locking issues common to TransMac.

Re-open TransMac (right-click, Run as Administrator). 2. Disable Antivirus Temporarily

When attempting to flash a macOS DMG file to a USB flash drive on Windows using Acute Systems TransMac, encountering a or "could not access disk/media" error is a frequent issue. This error typically means Windows is blocking third-party software from gaining exclusive low-level block access to the storage device.