If you want to play ASF on Mac, you should download and install an ASF video player like VLC.īelow are the steps on how to open an ASF file on Mac. It’s often used for streaming video and audio data.ĪSF file can be opened with Windows Media Player, PotPlayer, Winamp, VLC media player and other media players. This format supports playback from digital media servers, HTTP servers, and local storage devices. What Is ASFĪSF is short for Advanced Systems Format (formerly Advanced Streaming Format, Active Streaming Format) developed by Microsoft, which is part of the Media Foundation framework. Wondering how to convert ASF to MP4? Before that, let’s take a look at what is ASF and how to open ASF files easily. ASF is not widely supported while MP4 is compatible with most devices.