Claude Code Detects Crypto Miner Using About 12 Mac CPU Cores

Oct 19, 2026
Claude Code spotted an XMRig crypto miner consuming about 1175% CPU while helping a developer build a temperature monitor app.
Claude Code Detects Crypto Miner Using About 12 Mac CPU Cores

Anthropic's Claude Code detected an XMRig crypto miner on a developer's Mac while helping build a temperature monitor app, according to Tom's Hardware.

The coding agent warned that it had not installed the miner and said the XMRig process was using about 1175% CPU, equal to roughly 12 cores. The load pushed the Mac's temperature to 112 degrees.

The developer, who uses the Reddit name UntilHEX, said the malware explained the computer's poor performance.

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