Fortunately there are a variety of other choices available to play FLAC files in Mac OS, but for our purposes here we’ll focus on a simple and free solution that you might even already have on your computer. QuickTime is a great program for playing videos, and whether you own a PC, Mac, tablet, or smartphone, you can get enjoy your favourite videos with QuickTime. Free Quicktime For Mac 2018 High Sierra Music Festival.Free Quicktime For Mac 2018 High Sierra.