Can I still cast to Chromecast on my MacBook?
Fortunately, I am now able to cast on my computer. The trick is to set up Chromecast on your phone/tablet, as currently it cannot be setup from a computer. These days, Google Chrome has a cast option built-in, which can be accessed if you click the button with three vertical dots on the top right of Chrome. So there is no longer any need to download the Cast extension, as Chrome ships with it.