Hello, you have downloaded the source code of bling-desktop that is used to compile the desktop app and it’s only for Windows. For MAC you can just download bling-viewer (there is a link at the top) and open it with the command @phasearray posted.
open -a /Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --args --disable-web-security --user-data-dir=/Users/phasearray/Downloads/Blink/bling-viewer-master
Remember to close any instance of chrome before executing this command. Live view and automatic download of videos is only supported for Windows but at least you will be able to view and manually download videos, take snapshots and see relevant camera information.