I have two 2012 Macbook pros. I am using serato (and mixemergency) on one and streaming with OBS Stream labs on the other. I am trying to have my music videos show up as a source for Stream labs. I went into mixemergency pref and selected NDI Output. I have an ethernet connecting the two macbooks. Both machine have the green light and the self assigned ip address. I still do not see the NDI output as a source option in stream labs. I went into sharing and click file sharing within both macs (just to see if that changed anything) but there is still not option NDI. What am I missing? Thanks for any help.