with pre-3.9 clients), added support for the MacBook Pro Touch Bar, addressed various stability issues, allowed the user to export and import an encrypted list of computers with user credentials, and debuted the ability to use an "Assistance Cursor" to call attention to items for the remote user. This version now requires OS X/macOS 10.10.5 or later. Encryption Prior to version 3, ARD encrypted only passwords, mouse events and keystrokes; and not desktop graphics or file transfers. Apple therefore recommended that ARD traffic crossing a public network should be tunneled through a VPN, to avoid the possibility of someone eavesdropping on ARD sessions. ARD 3.0 has the option of using AES 128-bit encryption, the same as a basic SSH server. ARD 3.9 included as yet unspecified enhancements to communications security that made the native mode incompatible with previous-version clients. A Preferences checkbox was provided in the Apple Remote Desktop app to explicitly allow communications with older clients. ARD 3.9.2 made the use of this checkbox optional for seeing clients in the list. Legal In November 2017, the United States International Trade Commission announced an investigation into allegations of patent infringement with regard to Apple's remote desktop technology. Aqua Connect, a company that builds remote desktop software, has claimed that Apple infringed on two of its patents. Restrictions ARD does not support reverse connections to listening VNC viewers. See also Comparison of remote desktop software RFB protocol Remote Desktop Services Notes References External links Apple Remote Desktop Remote desktop Remote Desktop Virtual Network Computing Remote administration software MacOS remote administration software 2002 software Out-of-band management