Just a head's up for anyone who has not yet upgraded. There are some AFP sharing issues on MacPro5,1 with El Capitan OS X 10.11 at the moment. I cannot connect to this Mac Pro via "connect as" or by connect to server with afp:// address. Screen sharing works fine. File transfers within screen sharing work fine. AirDrop in and out is working when WiFi is turned on. Maybe this will be addressed in 10.11.1?