OBS has to be one of the coolest pieces of free Mac software out there. I'm not using it for anything in particular, but I thought I could show it off here anyway. It allows you to combine media inputs (camera, screen, audio, etc) and stream live or save to a file. Kind of like a TV studio. It is very easy to use. I did use it in the past to do some live Facebook streaming. I could, if I wanted, record the MacMost episodes with it.
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