In the 1960s, he bought thousands of acres of undeveloped land in the New Jersey Meadowlands and built warehouses and office buildings on it.
[2] In April 1989, the Mack family purchased the Texas Rangers in a syndicated deal with Frank L. Morsani from oil tycoon Eddie Chiles for $89 million.
[6] Mack's sons (David, Earle, William, and Fredric) all became directors of the new entity.
He was also a benefactor of the Long Island Jewish Medical Center, in New Hyde Park, New York, and St. Mary's Hospital in West Palm Beach.
[8] Mack and his wife lived in Palm Beach, Florida and Jamaica Estates, Queens.