[NOTE: Couldn't see another forum where such a question seemed to belong. A search was not productive.]
Running Talend 6.4.1 on macOS Sierra 10.12.6. Right-click-and-drag on a component does not work. The right-click always brings up the context menu no matter what. The only thing that works is to right-click to bring up the context menu, then select "Rod > Main". But that will get old, real fast.
An answer to this old post How to link components in jobdesign on MAC OS X says to hold the control key, but I've tried control, option, command and fn -- and every combination of those keys -- and it still just brings up the context menu.
Could you please take a look at this online document about:TalendHelpCenter:Compatible Operating Systems to see if you are on a compatible platform?