Yes, the Finder UI is fundamentally now a Cocoa app. However, internally Finder still uses many of the same Carbon file management APIs that it always has, sim

Yes, the Finder UI is fundamentally now a Cocoa app. However, internally Finder still uses many of the same Carbon file management APIs that it always has, simply because there still are no reasonable equivalents in Cocoa. Many Carbon APIs are still part of the Snow Leopard SDK and are available in 64-bit for that reason; the hot key API is one example.