I installed OS X 10.10 Yosemite build 14A238x
on Thunderbolt SSD / MacBook Air. A few days ago, Developer Preview 2 was released by Apple with the build number 14A261i
and it should be updated via the Mac AppStore. But it is not showing up for me.
Is there a hidden cache I can purge or any other way to persuade my Mac to obtain that update?