I'am using Android Studio 1.2 and OS X Yosemite to develop Android applications, I have turned on USB Debugging and the phone has the Media Device (MTP) option selected. When I run adb devices no devices attached are listed. I have seen some answers suggesting to download a driver but I can't even find the devices in the LG web site.
Has anyone solved already the problem?
if you did not see in the comments, I finally solved it. All I had to do was change the type of USB connection from the device from Media Device (MTP) to Send images (PTP)