Lightworks the open source editing software with a venerable history has now released a public beta of the Mac version of the software. It is version 12.0.a
Lightworks is free, though to get the Pro version, it is either $7.99 a month, $79.99 a year or you can buy it outwirght for $279.99. And for serious editing you will want this, since not only does it include other export optins, but it allows you to use Hardware I/O from BlackMagic, AJA or Matrox. It also allows project sharing and the ability to set project locations.
I have never tried lightworks, but need to give it a try. It certainly betrays it’s feature editing roots in that it can only work with one frame rate for the whole project. So if you need to import footage of a different frame rate you will need to convert it first.
A free or at least inexpensive cross platform editor is a great thing, but I need to play before I see how it actually is.