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2026/06/25 YunLab My Mac Was Cooking — the Culprit Was a Broken .git Open Codex on the laptop and it runs hot, with syspolicyd and trustd spiking to 160%. I suspected the M4 Max, Computer Use, MCP, hooks — none of it. The real culprit was buried deep: a broken .git. The whole chain, two machines two outcomes, and what the real damage is — not power, not 'reads wearing the SSD,' but heat.