Hi It may not be an Across issue but it does not hurt to ask. I installed Across in 2 iMac 27" machines. Set the one as a server and the other as a client, the tried looking for Bluetooth devices on the client machine by clicking the "add" button on the server. Checking for the Bluetooth devices on the client yields nothing. I can see the server machine as a whole but not the keyboard or mouse. Any advice? Thank you in advance.