Transmac Drive Has Been Locked By Another Program [PROVEN ◆]

If you are trying to create a bootable macOS installer on Windows, is usually the go-to tool. However, it is incredibly common to run into the frustrating error: "The drive has been locked by another program. Please close all programs and try again."

The error generally stems from one of three sources: active file explorer instances, system background services, or third-party security software. Transmac Drive Has Been Locked By Another Program

Tonight, the drive in question wasn’t his usual backup SSD. It was a tiny, scratched-up USB stick he’d found taped under his desk at work. On it was a single file: a fragmented log from a decommissioned transit authority server. Transmac – the old internal code for the Metropolitan Transit System. If you are trying to create a bootable

The error message "Transmac Drive Has Been Locked By Another Program" typically occurs when another program or process has locked the drive, preventing Transmac from accessing it. Here are some common causes: Tonight, the drive in question wasn’t his usual backup SSD

Windows Explorer often automatically attempts to index or generate thumbnails for files on newly connected drives. If the drive contains a file system recognizable to Windows (such as FAT32 or exFAT partitions often found on bootable drives), Explorer keeps an open handle on the drive letter. This prevents TransMac from locking the physical drive.

TransMac requires elevated privileges to bypass standard OS restrictions. Right-click the TransMac icon and select Run as Administrator 2. Disable Real-Time Protection