hw_decode runtime error

% ./hw_decode videotoolbox test.mp4 out.mp4
[h264 @ 0x7fe23402c600] Failed setup for format videotoolbox_vld: hwaccel initialisation returned error.
Failed to get HW surface format.
[h264 @ 0x7fe23402c600] decode_slice_header error
[h264 @ 0x7fe23402c600] Failed setup for format videotoolbox_vld: hwaccel initialisation returned error.
Failed to get HW surface format.
[h264 @ 0x7fe23402c600] decode_slice_header error
[h264 @ 0x7fe23402c600] Failed setup for format videotoolbox_vld: hwaccel initialisation returned error.
Failed to get HW surface format.
[h264 @ 0x7fe23402c600] decode_slice_header error
[h264 @ 0x7fe23402c600] Failed setup for format videotoolbox_vld: hwaccel initialisation returned error.
Failed to get HW surface format.
[h264 @ 0x7fe23402c600] decode_slice_header error
[h264 @ 0x7fe23402c600] Failed setup for format videotoolbox_vld: hwaccel initialisation returned error.
Failed to get HW surface format.
[h264 @ 0x7fe23402c600] decode_slice_header error
[h264 @ 0x7fe23402c600] Failed setup for format videotoolbox_vld: hwaccel initialisation returned error.
Failed to get HW surface format.
[h264 @ 0x7fe23402c600] decode_slice_header error
[h264 @ 0x7fe23402c600] Failed setup for format videotoolbox_vld: hwaccel initialisation returned error.
Failed to get HW surface format.
[h264 @ 0x7fe23402c600] decode_slice_header error
[h264 @ 0x7fe23402c600] Failed setup for format videotoolbox_vld: hwaccel initialisation returned error.
Failed to get HW surface format.
[h264 @ 0x7fe23402c600] decode_slice_header error
[h264 @ 0x7fe23402c600] no frame!
Error during decoding