I bought Rocksmith 2014 for Mac on Steam have been using it consistently for about a month. It took a long time to order the tone cable, but once I got it I really enjoyed the game. It's been a great motivation to get back into playing guitar.
I recently bought the original Rocksmith and Disc-Import Tool via Steam (Ubisoft Catalog Sale). When I started up Rocksmith 2014, no sound was playing from my guitar at any of the menus. When I tried to launch the tuner or play a song, I got a message saying my cable was unplugged, even though it was plugged in the port I had always used. I tried unplugging, waiting, and re-plugging into the same port. I tried different usb ports. I tried using a USB hub. I tried disconnecting and reconnecting the breakaway section of the Tone Cable. I tried restarting the application. I tried restarting my computer. I tried reinstalling Rocksmith 2014. None of these have resolved the issue. I am hesitant the think the cable has failed, because under System Preference > Sound > Input if I select the "Rocksmith USB Guitar Adapter" and strum my guitar, the input levels respond.
Has anyone else encountered this issue? I've opened a ticket with Ubisoft Support, but I probably won't hear back from them until sometime this week.