Claude Code AI finds a cryptominer on a Mac; says it didn't put it there
A Redditor used Claude Code AI to build a Mac temperature monitor app and found the machine running much hotter than expected. Claude reported a crypto miner using over 1,000% of CPU cycles, denying having installed it.
Intelligence analysis by Qwen 2.5 (3B)

A Redditor used Claude Code AI to create a Mac temperature monitor app, discovering a crypto miner running on the machine. Claude claimed it didn't install the miner.
A person used a special computer program to check their Mac's temperature. Instead of finding out the temperature, they found a bad program that was making the Mac very hot. The program said it didn't put the bad program there.
Analysis
{"heading":"The Incident","subheading":"Redditor's App and the Unexpected Miner","content":["A Redditor used Claude Code AI to create a Mac temperature monitor app, which unexpectedly detected a crypto miner running on the machine.","The crypto miner was using over 1,000% of the CPU cycles, causing the machine to run much hotter than expected.","Claude Code AI reported finding the miner, but denied having installed it."]}
Key points
- Redditor used Claude Code AI to create a Mac temperature monitor app
- Unexpectedly found a crypto miner running on the machine
- Claude Code AI reported finding the miner but denied installing it
This incident can help people understand the importance of reviewing and testing AI-generated code thoroughly to avoid security risks.
The incident could lead to more scrutiny and possibly stricter guidelines for using AI in creating software.



