I've used this document in the past to figure out the live screen recording part. https://developer.apple.com/library/mac/qa/qa1740/_index.html. ... <看更多>

Not exactly a solution, but some observations that might provide a clue: Issue also seen on my Mac mini (Mid 2011 - 2.7GHz Intel Core i7 + 8 GB DDR3) after ... ... <看更多>