Fast Startup saves a kernel snapshot to your hard drive. When you plug in a USB drive that was previously mounted before hibernation, Windows restores a stale lock state.
: Often recommended as a modern alternative with a more intuitive interface. BalenaEtcher
: Hardware switches on some USB drives or software-level read-only attributes can trigger a "locked" status. Step-by-Step Solutions 1. Run as Administrator
If Windows has initialized the drive with a partition scheme it recognizes, it might refuse to let TransMac overwrite it. Cleaning the drive via the Command Prompt breaks this lock. Transmac Drive Has Been Locked By Another Program
: While primarily for ISOs, it can sometimes handle macOS images depending on the format. Different USB Port
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
Sometimes TransMac struggles to overwrite a drive that contains an active NTFS partition. Formatting the drive to a neutral format first can break the lock. Open in File Explorer. Right-click your USB drive and select Format . Change the File System dropdown to exFAT or FAT32 . Fast Startup saves a kernel snapshot to your hard drive
Sometimes power management settings keep USB drives "active" even after they should be idle.
Open the , type cmd , right-click it, and select Run as Administrator . Type diskpart and press Enter .
: Ensure you right-click the TransMac application and select Run as administrator . TransMac requires elevated privileges to access raw disk hardware. BalenaEtcher : Hardware switches on some USB drives
The error message (or similar "Could not access disk" errors) in TransMac typically occurs because Windows security features or background processes are actively monitoring or protecting the USB drive . This prevents TransMac from gaining the exclusive low-level access it needs to format or write a Mac-specific DMG image to the drive. Common Causes
: Close any open windows showing the drive’s contents, as Windows often locks drives while they are being viewed.
Once the format completes, close Disk Management, open TransMac, and retry your task. 5. Temporarily Disable Windows Defender or Antivirus
Windows may be attempting to index the files on the drive. Step-by-Step Solutions to Fix the Error