MacのSeleniumでフルスクリーンショットを撮ると画面の一部しか撮影されない問題

ひとまず自分用。

selenium.java

System.setProperty("webdriver.gecko.driver", "/Applications/geckodriver");
        WebDriver driver = new FirefoxDriver();
        driver.manage().window().setSize(new Dimension(3400, 5810));

        int scrollTimeout = 500;
        int header = 0;
        int footer = 0;
        float dpr = 2;

        driver.get(URL);
        driver.findElement(By.xpath("xpath")).click();;
        Screenshot screenshot = new AShot()
        .shootingStrategy(ShootingStrategies.viewportRetina(scrollTimeout, header, footer, dpr))
　　　　　.takeScreenshot(driver);


        ImageIO.write(screenshot.getImage(), "PNG", new File("/Users/masalennon/Pictures/SeleniumPics/fullSizePic.png"));
        driver.close();

MacでやるならviewPortRetinaを使う必要あり。