Q:

Node.js to get/determine OS version

I'd like to determine whether some script that is being executed is running a particular version of Mac OSX.   I realize I can exec/spawn the command:
sw_vers -productVersion

Is there a way to do this synchronously (similar to process.arch) without node-exec-sync?   I realize its an accepted bad practice to spawn/exec synchronously, but I don't see another way. 

A:

you could use  the OS module like this:
var os = require('os');
os.platform(); // 'darwin'
os.release(); //'10.8.0'

and then map the release version to a specific version of Mac OS X.
Darwin to Mac OS X mappings can be found here

