Apple's Beats brand in April unveiled the Powerbeats Pro, a redesigned wire-free version of its popular fitness-oriented Powerbeats earbuds.
Mac OS X 10.4: Tiger
Apple has used similar feline names for previous versions of Mac OS X: 10.3 (Panther), 10.2 (Jaguar). In July, Apple registered a number of related trademarks: Lynx, Cougar, Leopard, and Tiger.
MacMagazine.com.br also reports that up until this point, 10.4 was known as "Merlot" internally. This is consistent with information available from MacRumors' sources.
Additional Info: Internal Build is at 8A85 with Safari v133