Open a web browser: Launch a web browser on your computer or mobile device. Visit the HBO Max website: Go to the official HBO Max website by typing "www.hbomax.com" in the address bar of your browser and pressing Enter. Select "Sign In": On the HBO Max homepage, look for the "Sign In" option. It is usually located in the upper-right corner of the screen. Click or tap on "Sign In." Choose your provider: HBO Max allows you to sign in using various TV or streaming service providers. Select your provider from the list of options provided. Common options include cable/satellite TV providers or streaming platforms like Hulu, Amazon Prime Video, or YouTube TV.