Part of the Operating systems glossary: Mac OS is the computer operating system for Apple Computer's Macintosh line of personal computers and workstations. A popular feature of its latest version, Mac OS X, is a desktop interface with some 3-D appearance characteristics.
Nine 3-year-olds were entered for the 138th Preakness Stakes: The Preakness post position draw was held at the International Pavilion in the Pimlico Infield at 6 p.m. on May 15, 2013 and were broadcast live on HRTV using a blind draw. After the draw Orb was installed as the even money favorite securing the rail.
In the United States, the three races that make up the Triple Crown are: 1  Kentucky Derby, run over the 11â4-mile (2.0 km) dirt track at Churchill Downs in Louisville, Kentucky. 2  Preakness Stakes, run over the 13â16-mile (1.9 km) dirt track at Pimlico Race Course in Baltimore, Maryland.