Sakamonk: hey I'm on a macbook pro 13" with OS 10.7 connecting my stock S4 with OS 4.2 via AirDroid, available for free on Google Play.
It works seemlessly via wifi, a browser, and a QR code... pretty cool actually! No need for cables or BT. It's simple.... leave samsung's Kies and all the other apps behind.
Try it, you'll be happy you did. Good Luck!
peace