Then you will be able to play audio and video files with QuickTime player. Perian codec is open-source and you can download Perain here. After you downloa the DMG file, double click on Perian.1.2.3.dmg file to install it. How to download and install K-Lite Codec for Mac – Perian? Perian is a free, open source, QuickTime component that extends QuickTime support for many popular types of media, including MKV, FLV, WMV, AVI, DivX, and XviD. Recently switched to mac computer, but have problem of playing MKV, AVI, WMV, FLV, MTS, MXF, etc with default Quicktime player? However, K-Lite Codec Pack only works in Windows system and there is not yet something like “K-Lite Codec Pack Mac”. K-Lite Codec Pack is a free package of media player codecs that enables the operating system and its software to play various audio and video formats generally not supported by the operating system itself including QuickTime video.