NEW YORK (AP) _ Time Inc. announced today that Jason McManus will succeed Henry Grunwald as editor-in-chief of the company's publications when Grunwald reaches mandatory retirement age at the end of the year.

McManus, 53, the managing editor of Time magazine, will be the fourth editor-in-chief in Time Inc.'s 64-year history.

Grunwald, 64, took the position in June 1979.

he company said Grunwald recommended McManus as his successor and the board of directors voted today to accept the recommendation.