A developer using Claude Code to help build a temperature monitor app got a friendly warning from the coding agent. “Your Mac is running a crypto miner that I didn’t put there,” flagged the helpful agent. “I saw xmrig using about 1175% CPU, roughly 12 cores,” it informed its human master. Perhaps developer and Redditor UntilHEX should have sensed the crypto miner’s presence without AI help, as they admitted the malware’s presence “explains why my Mac has been running like s**t.”