Transmac Drive Has Been Locked By Another Program

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."

Learn about standard troubleshooting steps for various error symptoms in the official TransMac Help guide Transmac Drive Has Been Locked By Another Program

• 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.

The "Drive has been locked by another program" error in TransMac typically occurs when a Windows process—such as File Explorer, an antivirus, or disk management service—is actively accessing or monitoring the USB drive, preventing TransMac from gaining the exclusive control needed to format or write to it.  Immediate Solutions  Understanding and Fixing the "TransMac Drive Locked" Error

Emily had been working on a critical project, a design portfolio that was due in just a few hours, and her external drive contained all of her crucial files. Without it, she was stuck. She tried restarting her computer, but the error persisted. She checked the drive's connections, thinking maybe it was just a loose cable, but everything seemed secure. How to do it: Turn off Real-time protection