I'm trying to update software on my Galaxy XII S (currently running 4.0.4) with my MacBook(running 10.9.2). I just installed Kies(220.127.116.1132_5) onto my Mac. When I plug my phone in via USB, the computer doesn't realize it's plugged in (not on Kies or on Finder). Help appreciated :)
With the S2x disconnected from your computer, go to Settings > Developer options and enable USB debugging by placing a checkmark in its box. If you haven't already done so, reboot your computer, then open Kies and reconnect your S2x. Kies should now recognize your S2x.