Answer:
H.264
Step-by-step explanation:
A file type can be defined as the standard used to store digital data such as pictures, texts, videos, and audios. They all have unique file extension which determines the type of software program (application) to be used for opening a particular file and accessing its data e.g pictures (jpeg, png), texts (txt, docx, rtf), audios (mp3, acc), and videos (mp4, 3gp, avi, h.264, mkv).
Sometimes, computer users make the mistake of opening files with the wrong software application or program, this often leads to an error due to the incompatibility of the software application with the particular file.
H.265 is a high efficiency video codec (HEVC) and it's a standard video compression codec designed and developed to offer a better data compression, as an upgrade to the advanced video coding (AVC) standard.
Hence, the option or file extension (format) which would allow you to watch a high definition (HD) video, without delays in playback, on a computer with a Mac operating system (OS) and a connection that has a lower bit rate is the H.264 format.