Apple Inc. confirmed that some new MacBook Pro computers didn’t perform as advertised under heavy workloads, responding to complaints from users. The company unveiled a software fix for the high-end devices and apologized. The problem is due to the laptop’s thermal management system, which throttles processing speeds to prevent overheating in some situations, the Cupertino, California-based company said. "Following extensive performance testing under numerous workloads, we’ve identified that there is a missing digital key in the firmware that impacts the thermal management system and could drive clock speeds down under heavy thermal loads on the new MacBook Pro," Apple said...