krix requires Mac OS X 10.5 (Leopard)

it runs smooth on a Dual Core Mac Mini,
but it might be slow on older machines

it won't change your mp3 files but
it will create a 'hidden' folder named .krix for pre-scaled cover images in each album folder

if your mp3 files aren't tagged with images and you don't have cover images in your album folders this software won't make much sense for you

a short manual is available here