So here's how to open demon deals v05.5 on MAC:
1. Don't extract the ZIP using the default mac Archive tool! It will mess the file structure up. Often Mac unzips downloads by default and moves the ZIP file to the trash. Instead, delete the default unzipped file and put back the game ZIP file in your downloads folder. Then unzip using a third party unzipper. I used TheUnarchiver.
2. Once unzipped, right click on the "njws" application and press [Show Package Contents]. After that click on the Contents folder. Open Terminal in the background before doing these two steps.
i) Go Frameworks>nwjs Framework.framework. After this you should see 5 terminal commands. Right click-open each command in terminal to verify them.
ii) Go into the MacOS folder. Inside is the njws terminal command. Right click-open it in terminal and verify it. This will take a few seconds/minutes but it should work.
3. After following those steps, move the game into your Applications folder. Then right click-open the game.
This is what i did to get the game running. It's very important to unzip using a third party unzipper tool, and to verify all the files BEFORE moving the game to the Applications folder. So fucking annoying...