OpenAI ChatGPT app on macOS is not sandboxed
The OpenAI ChatGPT app on macOS is not sandboxed and stores all the conversations in plain-text in a non-protected location:
~/Library/Application\ Support/com.openai.chat/conversations-{uuid}/
So basically any other running app / process / malware can read all your ChatGPT conversations without any permission prompt.
Read more here: External Link