"The Finder can't complete the operation because some data in "file" can't be read or written (error code -36)" Appears when attempting to drag a file to our shared server (Mac Mini running OS X 10.9) from two different iMac's, however our windows machines have no such issue. The mac gives this error when attempting to transfer one file or multiple files. After clicking ok on the error it will transfer the first file only. If you try moving a folder only an empty folder shows up on the server. It apparently hasn't always done it, so something must have changed but I'm not positive what would have changed. I've checked the permissions on the drive the file share is on, and made sure that user could read/write the drive, and then propagated the permissions to all folders on that drive. Any ideas of things to check, possible root causes?