updates readme with mac instructions and fixed package.json security audit

Author: stevenrick

README.md

@@ -20,6 +20,8 @@ ChronoSense is a foundational piece of recording software built on webtech with
 3.  Navigate to where you cloned the ChronoSense folder and run the command:  
     `npm install`
 
+3b. **(MacOS only)** Be sure `ffmpeg` is available in your PATH, we recommend using [Homebrew](https://brew.sh/) with `brew install ffmpeg`
+
 4.  Test to see if the application (as it is) can now run by going to the main ChronoSense folder and typing the following command to start the application:  
     `npm start`
 

package.json

@@ -12,7 +12,7 @@
 	"author": "Alexander Schonken",
 	"license": "ISC",
 	"dependencies": {
-		"download": "^7.1.0",
+		"download": "^6.2.5",
 		"electron": "^11.4.1",
 		"electron-packager": "^15.2.0",
 		"extract-zip": "2.0.1",