Transmac Drive Has Been Locked By Another Program

Since "Transmac Drive Has Been Locked By Another Program" is a common technical error message rather than a product title, I have interpreted your request as a review of the software functionality, the error itself, and the solutions available.

Here is a review of the situation from the perspective of a user trying to create a bootable macOS USB on Windows.

Preventive tips

Always eject/unmount drives before removing.
Avoid running multiple imaging/backup utilities simultaneously.
Keep TransMac and OS updated.
Use a UPS to avoid abrupt shutdowns that leave handles hung.

If you want, tell me: (A) the OS you’re using (Windows/macOS), (B) whether the target is a physical drive or DMG/ISO, and (C) any error codes — I’ll give a targeted command sequence. Transmac Drive Has Been Locked By Another Program

(Invoking related search suggestions.)

What Does "Drive Has Been Locked" Actually Mean?

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." Since "Transmac Drive Has Been Locked By Another

However, Transmac requires raw disk access. It needs to talk directly to the volume’s sectors. If any other process—even a seemingly harmless one like File Explorer or an antivirus scanner—is holding a handle to the drive, Transmac sees this as a lock.

The error message is Transmac’s polite way of saying: "I cannot get exclusive rights to this drive. Another program is interfering." Preventive tips

1. The "Full Clean" Method (Most Reliable)

Rating: ⭐⭐⭐⭐⭐ This fixes the issue 90% of the time. Because Windows creates hidden partitions on USB drives, TransMac gets confused.

How to do it: Open Windows Command Prompt as Admin. Type diskpart -> list disk -> select disk # (your USB) -> clean.
Result: This wipes the USB completely. When you return to TransMac, the drive is seen as "unallocated" and the lock is gone.

1. Quit Conflicting Applications

Check for other disk-burning software: Look for any other disk-burning software that might be running in the background and quit them.
Use Activity Monitor: Open Activity Monitor (you can find it in Applications > Utilities), and look for any processes related to disk access or burning. If you find any, try quitting them.

8) If drive is write-protected or corrupted

Check hardware write-protect switches (USB drives/SD cards).
Run chkdsk (Windows): chkdsk E: /f
Use disk utilities to repair filesystem; back up data first if possible.

3. Disable Antivirus Temporarily

Rating: ⭐⭐⭐

How to do it: Turn off Real-time protection in Windows Security.
Result: This works if Windows Defender is intercepting the write command, but it is risky for inexperienced users. Only use this if the "Full Clean" method fails.