Thanks for taking this enquiry . Using OS MAC 10.13.4 HIGH SIERRA Attempting to use Cyberduck to download files into Apple TV4 after research mentioned the App as a simple effective tool. Attempted connection via "Open Connection" and Bookmark technique - both received message "Connection refused (Connection refused). The connection attempt was rejected. The server may be down, or your network may not be properly configured." All entries of username and password as per "registration"and using Apple tv I.P. address/FTP and SFTP Protocol . Unsure if Cyberduck is compatible with High Sierra. Please advise solution. Thankyou. Sincerely, John Kesterton