Error: src/modules/uORB/topics/actuator_armed.h


I am new to PX4 development. And I am doing it on Mac OS 10.11.6 by following instructions outlined at:

I downloaded the older QT 5.4 to match the one used in the video. There are a few difference b/n what I am seeing and what is on the video. But I was able to specify /usr/local/bin/cmake although there is no build option to specify the path.

I proceeded with the build and got the following error message:

Any advice is much appreciated.