Can't open application from unidentified developer I'm using macOS Sierra and I can't open an application because it's from an unidentified developer. I went into my Security and Privacy settings and clicked on "open anyway" but it still doesn't let me open the app. How do I open an app from an "unidentified developer"?
There's a terminal command for this. I don't remember using it, and never wrote it down in my Sierra tweaks file. However:

sudo spctl --master-disable

From OSXDaily: How to Allow Apps from Anywhere in macOS Sierra Gatekeeper