Mac error 43 is a common issue that is encountered by many Mac users. The error is mainly faced when you try to copy or move any file that has been renamed recently. The specific error message you are getting is The operation could not be completed (error -43) or file not found, folder not found. Whenever this error has occurred you will not be able to open that folder or access any file of which is a kind a data loss. There are several other reason that can lead to Mac error 43 like when the file is infected by virus, any logical or file system corruption in the Mac hard drive, partitioning error etc. You can fix Mac error 43 by using any antivirus program or formatting the drive but in this way the affected files may get deleted. You must be wanting to restore those files back. You can use any backup that is available to you or use the Time Machine utility after Mac error 43 fix. If the back up does not exist then you can try Mac data recovery software. This will scan the system hard drive for any deleted files or folder and show you the preview to select and restore.