NaturalReader is indeed available on different operating systems, including Windows and macOS. The software caters to a wide range of users by providing compatibility with these popular platforms. Additionally, NaturalReader Online is a web-based version that can be accessed through most modern web browsers, making it versatile for users on various devices such as laptops, desktops, and even tablets. This flexibility allows individuals to utilize Text to Speech features whether they are at home, in the office, or on the go. For up-to-date information regarding specific system requirements or additional features, it is always a good idea to visit the current web page of NaturalReader.