Fix: This Operation Can’t Be Completed Unexpected Error Occurred (Error code -50) – Mac Hard Drive
You may receive an error when attempting to copy, move, or delete files on an external hard drive in Mac OS X.
The operation can’t be completed because an unexpected error occurred (error code -50)
- You may have the hard drive mounted in a virtual machine on your Mac, such as Windows using Virtual Box. It seems the VM may lock the volume and prevent you from copying files to it on your Mac. Try removing the device from your VM first and see if it allows you to copy or move files to it on your Mac.
- If that did not work, unmount the drive in Mac OS X. If you get a message, The disk “” wasn’t ejected because one or more programs may be using it click Force Eject. Then, re-mount the drive and try to copy or move files again to it.

- All else fails, run disk utility first aid (Applications -> Utilities -> Disk Utility) on the hard drive to ensure the disk is running ok. After, reboot your Mac and re-mount the hard drive and attempt to copy or move files to it again.

If this has not worked for you or different steps you took did work for you, please use the comment form below to let us know.