Zoom not detecting MeetingDouble? Fix it in 30 seconds.

You installed MeetingDouble, the menubar icon is green, but Zoom’s camera dropdown still only lists FaceTime HD and Continuity Camera. Almost every time this happens, the fix is one of two things — and you can rule them both out in under a minute.

Fix 1 — Quit Zoom completely, then reopen

Zoom enumerates cameras at process launch. If Zoom was running before you installed MeetingDouble (or before the system extension finished loading), it doesn’t know the new camera exists. Reloading the meeting window is not enough.

Quit Zoom the macOS way:

• Click the Zoom icon in the Dock or menubar.
• Press Cmd+Q, or choose zoom.us → Quit Zoom.
• Do not just click the red dot on the meeting window — that only closes the window, the process keeps running and your camera list is still stale.

Then reopen Zoom from Applications or Spotlight. Go to zoom.us → Settings → Video. The Camera dropdown now lists MeetingDouble. Pick it. Zoom remembers the choice across restarts.

Fix 2 — Verify the system extension is activated

If MeetingDouble still isn’t in the list after a clean Zoom restart, the CMIOExtension didn’t activate. Open Terminal and run:

systemextensionsctl list

You’re looking for a row in the com.apple.cmio section that matches:

* * dev.ogtay.meetingdouble.cmio (1/0.x) MeetingDouble Camera [activated enabled]

Two states need to be present in that row: activated and enabled. If either is missing, the extension never finished loading. Most common reasons:

• You didn’t complete the System Settings → Privacy & Security → System Extensions approval. See the install doc.
• You clicked Don’t Allow when macOS prompted. TCC remembers this permanently; reinstall is the only clean fix.
• You’re on macOS 13 or older. MeetingDouble requires macOS 14.2 (Sonoma) or later — Sequoia is the supported target.

If the row shows [activated waiting for user]

The approval prompt was triggered but never accepted. Open System Settings → Privacy & Security. Scroll to the bottom. There should be an Allowbutton next to “System software from application ‘MeetingDouble’ was blocked.” Click it, authenticate, then re-run systemextensionsctl list to confirm the state flipped to [activated enabled].

If Zoom shows MeetingDouble but the video is black

The extension is wired in correctly, but the app process isn’t feeding frames into it. Open the MeetingDouble menubar popover. The status dot next to Virtual Camerashould be solid green. If it’s grey or red:

• Hit Restart Camera in the popover (recycles the AVCaptureSession).
• If still black, MeetingDouble probably can’t see your webcam. Check Privacy & Security → Camera and make sure MeetingDouble is toggled on.
• Quit MeetingDouble fully (menubar icon → Quit), then relaunch from Applications.

If Zoom in the browser doesn’t see it

Browser Zoom uses the same macOS camera list as native Zoom — but each browser maintains its own permission allow-list. After Zoom asks for camera permission in Chrome or Safari, you may need to refresh the meeting tab once for the dropdown to repopulate with MeetingDouble.

Last resort: reinstall

If systemextensionsctl list shows the extension as activated and Zoom still won’t list it, the system extension cache is corrupt. Drag MeetingDouble out of Applications, restart your Mac, reinstall from the DMG, re-approve the system extension. This resolves the long tail of weird macOS edge cases.