I have been successfully converting jpgs to pdf in Mountain Lion with: do shell script "/System/Library/Printers/Libraries/./convert -f " & "\"" & _posix & "\"" & " -o " & "\"" & _newPosix & "\"" I recently moved to Mavericks and now get this error: -- error "sh: /System/Library/Printers/Libraries/./convert: No such file or directory" number 127 The error message is right - the directory does not exist under Mavericks. Can anyone suggest a replacement for this code?