Java2D Swing rendering off center on ONLY OSX

I'm having an odd issue with my animation that is happening only on OSX, and not on windows. On my windows computer, the animation occurs full screen in a JFrame, as it is supposed to - however on my mac the animations are only drawn in the lower left corner:

Windows:

OSX:

Here is the code that I use to create the window, and draw the frame (Same on both computers):

public class AnimationMain extends JFrame implements Runnable{

BufferStrategy bs;
/**
 * Initializes the properties of the JFrame that we are drawing on
 */
public void init(){
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    this.setTitle("Final Project V2");
    this.setSize(7*128, 5*128);
    this.setResizable(false);
    this.setVisible(true);

    createBufferStrategy(3);
    bs = getBufferStrategy();
}
/**
 * Calls out to a drawing method, which simply draws everything on the screen
 * @param g
 */
public void draw(Graphics2D g){
    if (GMI.gameState.equals(GameState.PLAYING) && GMI.gameReady){
        AnimationManagement.MainGameDisplay.drawMainGame(this, g);
    }

}


/**
 * Calls the init method, and then repaints the frame
 */
public void run() {
    init();
    while (true){
          Graphics2D g = (Graphics2D) bs.getDrawGraphics();
          draw(g);
          g.dispose();
          bs.show();
        try{Thread.sleep(AppInfo.frameTime);}catch(Exception e){e.printStackTrace();} //Sleep for 10ms between redraws
    }
}

Any help would be greatly appreciated, thanks!