Close the prompt and try the TransMac "Format Disk for Mac" process again. 4. Close Conflicting Processes Check if another program is "touching" the drive: File Explorer : Close all open folders. Task Manager Ctrl + Shift + Esc
: Type clean . This removes all formatting and usually breaks any "locks" held by other software. Exit : Type exit and close the window. 2. Disable Real-Time Security TransMac "could not access drive" - GitHub Gist Transmac Drive Has Been Locked By Another Program
Below is a comprehensive guide to unlocking your drive and getting back to your installation. Step 1: Force Close Background Interference Close the prompt and try the TransMac "Format
Explore alternative methods for creating bootable USBs if TransMac fails on the UUByte technical blog Are you trying to create a bootable macOS installer , or are you simply trying to read files from an Apple-formatted drive? Task Manager Ctrl + Shift + Esc : Type clean
: Security software like Windows Defender or third-party antivirus can lock the drive to scan it for threats. Try disabling "Real-time protection" temporarily while using TransMac.
: Type list disk . Look for the disk number that matches your USB size (e.g., Disk 1 or Disk 2).