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When I run my application on MacBook, I can see in the kernel log:

AppleMCP89TMS::powerGatingUp(1)

Does anyone know what this is? Is this a hardware error?

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Power Gating is the process of using transistors to physically cut off power to electronic components. Newer computer architectures do this as a way to save battery power by totally eliminating the 'leakage' in components that aren't doing anything. I don't know exactly what this log entry means, but I suspect that it's just a result of an automatic power management process and nothing to worry about (especially if your application activates any kind of peripheral hardware).

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