Kaabah is the second extension to the famous F8b+ route Mecca. The other Mecca Extension, F8c (first ascent also McClure) was repeated by Smitton last year.
In the video below McClure says that Mecca Extension is really the "easy" way up the top wall, avoiding the hardest challenges. Kaabah looks to pack in as much hard climbing as possible!
You can see Steve McClure make the first ascent of Kaabah in this video.