Just kidding of course, I have no idea what Lightroom is. =) Just thought I'd beat the Linux people to it for a change.
I know nothing of Mac, but the SBBOD (spinning beach ball of death) seems to be the same kind of bane as the Windows BSOD (blue screen of death).
Of course not. Nobody makes a Lightroom equivalent for Linux, a professional photography workflow solution. Darktable (oh, how original the naming) is trying to get there, but still far away. It doesn't help that color management on Linux sucks, and certain things need to be licensed.