axels-iMac:MacOS axel$ ./gqrx
Mac OS; Clang version 7.0.0 (clang-700.1.76); Boost_105900; UHD_003.009.001-0-unknown
gr-osmosdr v0.1.4-56-g1f2511dd (0.1.5git) gnuradio 3.7.8.1
built-in source types: file fcd rtl rtl_tcp uhd hackrf bladerf rfspace airspy
Using Volk machine: sse4_1_64_orc
*** alpha: 0.242535
INFO: Audio sink arch: osx
ERROR:
A unique output audio device name matching the string 'built-in' was not found.
The current known output audio device names are:
Digital-out (HDMI)
Digital-out (HDMI)
Digital-out (HDMI)
Digital-out (HDMI)
Line-out (Green Rear)
Headphones (Green Front)
libc++abi.dylib: terminating with uncaught exception of type std::runtime_error: audio_osx_sink::setup
Abort trap: 6