![]() ![]() The SMC needs to be reset, usually because of a software glitch.A common reason for failure is damage when a user attempts to repair or upgrade their Mac. Unfortunately, as these are often embedded in hardware components, replacement may require a complete exchange logic board, or similar. Among the common reasons for failure are: The fans themselves, and associated air ducts, grilles, etc.įailure in any part of that system can render the system non-functional, which should release the fans to run at maximum speed for safety. ![]() The Core Duet software control system for energy management in macOS.The System Management Controller (SMC), either a separate custom chip or part of Apple’s new T2 chip in some recent models, with its own firmware.Temperature sensors embedded in several or many parts of its hardware. ![]() The control system consists of the following components:
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