I'm having some trouble enabling my usb mic. Whenever I try to click the "enable track for recording button" in the audio track mixer I'm met with a message that states that I cannot record without adding a valid input device. So I do preferences > audio hardware. Here I'm met with two things 1) the ASIO Hardware section and 2) the Output Mapping section. No where can I find a Input selection dropdown menu. I've recently found my mic under the ASIO Hardware dropdown, but the issue is further drawn out. When I return to the Audio Track Mixer I cannot press the "enable track for recording" button. I'm not entirely sure what's happening here. I'm using a Mac.