Pneumonia.

"Comic actor Bernie Mac died early Saturday of complications from pneumonia, according to a family member and his publicist."
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"From Sarcoidosis, he has been in hospital all week after Pneumonia Complications. The Ocean’s Eleven star was aged just 50-years old.

Bernie Mac had been suffering from sarcoidosis; this is an inflammatory lung disease which produces small lumps of cells in the body’s organs. Mac’s condition went into remission in 2005. Last week the comedian had been admitted to hospital due to pneumonia."

He played a great role in Oceans 11, 12, and 13 D=

There goes the ocean series.

"The world just became less funny" - George Clooney