Really not much to see here, as the author originally did not know Apple uses stone age FOSS tools because of GPLv3.

Sources here: http://opensource.apple.com

Apple doesn't seem timely in getting sources put up. Wayback Machine shows that 10.9.5 was posted around October 7th even though that update was distributed to users on September 17 (~20 day gap), so they're not exactly adhering to the license as they should.

Also there is no sources for 10.10 and does iOS 7 and 8 really use no GPL'd or other FOSS'd code?