TransMac requires exclusive access to the USB drive to format it to a Mac-compatible file system (like HFS+ or APFS) and write raw image data. The error happens when: is browsing the drive. Antivirus software is scanning the drive. Another disk tool is accessing the device. The drive was not properly ejected previously. Top Solutions to Fix TransMac Drive Locked Error Follow these solutions in order to resolve the issue. 1. Close All File Explorers and Programs
Type list disk and press Enter. Identify your USB drive number (e.g., Disk 2) by size.
Hardware switches or software-level read-only attributes can prevent TransMac from proceeding. Step-by-Step Resolution Transmac Drive Has Been Locked By Another Program
If the quick checks didn't work, let's get more specific.
If you need help resolving this issue, please share a few details to narrow down the cause: What are you currently running? TransMac requires exclusive access to the USB drive
Sometimes TransMac struggles to overwrite raw, unallocated space left behind by a wiped drive, or it fails to overwrite complex partition styles like GPT. Formatting it to a standard Windows format first solves this. Press and select Disk Management . Locate your USB drive in the bottom visual list.
Open TransMac (as administrator) and try to format the drive as or burn your DMG image immediately. 4. Format the Drive to FAT32 First Another disk tool is accessing the device
If using third-party software (like McAfee or Norton), disable it until the TransMac operation is complete. 3. Use Diskpart to Force Clear the Drive
Type select disk X (replace X with your drive number) and press Enter. Type clean and press Enter. Once done, exit, and try using TransMac. 5. Disable Antivirus Temporarily