There are two solutions to come out of this one having backup of AVI file in any storage device and one more utilizing best repairing tool to fix AVI files.
Inaccurate Synchronization - When AVI file is played on Mac system, if audio and video of that file is not synchronized accurately then it will become inaccessible to users.This is one of the major reason for AVI file corruption as a result Mac unable to open AVI file Trojan Attack - Viruses get into Mac system due to unreliable third party utilities, unsecured data, when internet is used to download applications etc.Unfortunately, sometimes due to unexpected reasons AVI file cannot be opened on Mac systems.
This format is flexible that allows users to compress and edit files. Basically, an AVI file contains data container comprising audio and video files that help to synchronize them during playback time. AVI stands for Audio Video Interleave is the first media format that was used to store audio, video files launched by Microsoft.