AI Overlay for Examity Live Proctor - Mac Setup
Examity provides live, on-camera human proctoring for US universities and certification bodies. The proctor connects through a Chrome extension or the Examity desktop app, then opens a screen-sharing session over WebRTC.
Examity's tech stack is straightforward by proctor standards: a Chrome extension that requests getDisplayMedia or its OS-level equivalent, then pipes that stream over WebRTC to the live proctor's browser. There is no kernel hook and no kernel extension. macOS' getDisplayMedia respects window-level privacy by design (Apple ships the API that way). LDBypass sets the privacy flag, so the proctor watches your exam screen without seeing the overlay window even when both are visible to you simultaneously.
Key points
- Examity Level 1 is automated; Level 2 and 3 add a live proctor on a video call. Capture surface is identical across levels.
- The proctor will ask you to share your screen; choose "entire screen" as instructed - the overlay still does not show.
- Examity asks you to do an environment scan with your laptop camera; the overlay is invisible to the screen but visible to a separate webcam aimed at it.
- Examity flags secondary monitors. Use only your built-in display during the exam.
How it works
┌── macOS host ─────────────────────────────────┐ │ ┌── browser tab + WebRTC ──────┐ │ │ │ Live screen share to │ ← stream │ │ │ remote human proctor │ follows │ │ └──────────────────────────────┘ capture │ │ APIs │ │ ┌── LDBypass overlay ──────────┐ │ │ │ Excluded from getDisplayMedia│ ← hidden │ │ └──────────────────────────────┘ from share│ └───────────────────────────────────────────────┘
Compatibility on Mac
| macOS 14 Sonoma+ | Yes (required for window-privacy API) | ✓ |
| Apple Silicon (M1/M2/M3/M4) | Native arm64 build | ✓ |
| Intel Macs (2019+) | Universal binary supported | ✓ |
| Examity Chrome extension | getDisplayMedia respects window privacy | ✓ |
| Examity desktop app | macOS WebRTC capture, same exclusion | ✓ |
Common questions
Can the live proctor see the overlay if they ask me to point my camera at the screen?
A separate camera physically aimed at the screen sees pixels regardless of the privacy flag. The flag only protects against software capture APIs, not third-party photographs.
Does Examity record the session for later review?
Yes, the recording is the same WebRTC stream. The recording also lacks the overlay because the source frames lacked it.
Will Examity's ID verification step trip on the overlay?
No. ID verification uses the webcam to compare your face to a stored photo. The webcam pipeline is separate from screen capture.