How Zoom Detects Google Meet Without Microphone Access

TL;DR

• Zoom can notice that Google Meet, Teams, Slack, and other applications may be in a meeting and offer to start My Notes
• On macOS, Zoom monitors Control Center’s sensor-indicators log stream
• The messages contain records such as [mic] Google Chrome (com.google.Chrome)
• Zoom extracts an application identity and detects when microphone use starts or stops
• On Windows, it obtains equivalent application-usage information from the per-user Capability Access Manager microphone records in the registry
• Reading this metadata requires neither administrator/root privileges nor Zoom microphone permission