H.264 is a video codec that is commonly used for video compression and distribution. macOS has built-in support for playing H.264 files using the QuickTime player, which is included with the operating system.
To play H.264 files on macOS, simply double-click on the file to open it in QuickTime player. Alternatively, you can right-click on the file, select "Open With," and choose QuickTime player from the list of available applications.
H.264, also known as AVC (Advanced Video Coding), is a widely used video compression standard. It is a popular format for recording, compressing, and distributing high-definition video content, and it is used in a wide range of applications, including television broadcasts, video conferencing, streaming video services, and more.
H.264 files are video files that use the H.264 video compression standard. They can be identified by their file extension, which is usually .mp4, .m4v, or .mkv. H.264 files are known for their high video quality and relatively small file size, making them ideal for use on the web or in other bandwidth-constrained environments.
H.264 files can be played back on a variety of devices, including smartphones, tablets, computers, and set-top boxes. Many media players, such as VLC, Windows Media Player, and QuickTime, support playback of H.264 files.
If you need to convert or edit H.264 files on macOS, there are several third-party applications available that can help. The best option to play H264 files on macOS in my opinion is Elmedia Player
Note that H.264 is a video codec and does not include audio. If your H.264 file does not have audio, you will need to use a separate audio codec or file to play the audio.