employ-front/node_modules/osx-release/index.js

'use strict';
var os = require('os');

var nameMap = {
	'15': 'El Capitan',
	'14': 'Yosemite',
	'13': 'Mavericks',
	'12': 'Mountain Lion',
	'11': 'Lion',
	'10': 'Snow Leopard',
	'9': 'Leopard',
	'8': 'Tiger',
	'7': 'Panther',
	'6': 'Jaguar',
	'5': 'Puma'
};

module.exports = function (release) {
	release = (release || os.release()).split('.')[0];
	return {
		name: nameMap[release],
		version: '10.' + (Number(release) - 4)
	};
};