A Redditor used Claude Code AI to build a M a c temperature monitor app and found that the machine was running much hotter than expected. Claude reported that it found a crypto miner using more than 1,000% of the CPU cycles – then added an unprompted comment denying having installed it.
Source: [9to5Mac](https://9to5mac.com/2026/10/26/claude-code-ai-finds-a-cryptominer-on-a-mac-says-it-didnt-put-it-there/)