Apple on Thursday announced a long-awaited update for the MacBook Pro, giving the laptops a much-needed performance bump but not any meaningful change in design. Most notably, Apple has not fully changed the design of the laptops’ keyboards, which have drawn serious complaints from consumers who find them unreliable. The new models — one 13-inch model and one 15-inch model, both with Apple’s Touch Bar — have new chips that Apple said should dramatically increase performance.