It allows for video conversions between 200+ formats and devices for free, like MKV to MP4, MP4 to FLV, video to iPhone/Android, etc. Here, WinX Video Converter is a top-notch 4K/HD video converter capable of converting high-res HD 1080p/720p MKV videos to QuickTime-supported formats without any quality loss. Even the 4K MKV and HDR MKV videos can be opened by QuickTime after conversion.This way is feasible for any types of Mac computer including MacBook, MacBook Pro, MacBook Air, iMac, iMac Pro, Mac mini and Mac Pro.MOV, MP4 and M4V are the three formats most suitable for QuickTime Player to play, so you need a video converter that can convert MKV to MP4, MOV or M4V.Install Perian – Only for QuickTime 7.6.6
Play MKV with Mac MKV Player - Recommended Convert MKV to QuickTime Supported Format - Best