See here. The last MacArthur "genius" fellowship awarded to someone they classified as philosopher was in 1993.
On the whole, scholars outside of philosophy tend, I think, not to see much value in what most professional philosophers do. The MacArthur drought is one reflection and measure of that.
Not that prizes matter. Sheesh. We're too busy thinking about important stuff like whether the external world exists (82% of target faculty agree that it does). The MacArthur folks probably think that climate change is a more important topic. But if the external world doesn't exist then the climate can't change, can it now? So there!