There is one video which plays but sound not coming in Mac
Mac and iOS only supports AAC and MP3 Audio CODEC, while my video has MPEG Audio layer 1/2 Audio CODEC. So, while converting/compressing this video, my client has selected audio CODEC to default rather than AAC.

Here are difference between those two video files:


  Screenshot 1 shows the CODEC details of video that gives sound:





  Screenshot 2 shows the CODEC details of video that does not give sound: