Installing MeetingDouble on macOS Sequoia.

MeetingDouble ships as a notarized, Developer-ID signed DMG. There is no Mac App Store build — Apple rejects camera-spoofing apps. Install takes under a minute, plus a one-time system extension approval that macOS will only show you once.

1. Download the DMG

Buy a license at meetingdouble.app/buy, then grab the latest build from your dashboard Downloads tab or the link in your purchase email. The DMG is about 14 MB. Verify the file is signed by Apple’s notary by right-clicking and choosing Get Info — the Where from field should read meetingdouble.app.

2. Drag MeetingDouble.app into Applications

Open the DMG, drag the app icon onto the Applications shortcut. Eject the DMG and trash it. Standard macOS install — nothing custom here.

3. Launch and approve the system extension

Open MeetingDouble from Launchpad or Spotlight. On first launch the app requests permission to install its CMIOExtension — the system extension that Zoom, Google Meet, and Microsoft Teams will see in their camera dropdown.

macOS shows this dialog: “System Extension Blocked. A program tried to load new system extension(s). If you want to enable these extensions, open Privacy & Security settings.” Click Open System Settings.

You land on System Settings → Privacy & Security. Scroll to the bottom. Under System Extensions you’ll see a line that reads “System software from application ‘MeetingDouble’ was blocked from loading.” Click Allow next to it. Enter your admin password.

4. Confirm the virtual camera is loaded

Back in MeetingDouble’s menubar popover, the green dot next to Virtual Camerashould appear within a few seconds. If you want to verify from Terminal:

systemextensionsctl list

Look for a row containing dev.ogtay.meetingdouble.cmio with state activated enabled. That’s it — MeetingDouble will now appear in every Mac app that asks for a camera.

If the “Allow” button never appears

This is the most common install issue. macOS only shows the approval prompt once per installer signature. If you previously denied or dismissed it, the prompt is silenced. Fix it by toggling the extension request again:

• Quit MeetingDouble completely (menubar icon → Quit).
• In Terminal: systemextensionsctl reset (requires SIP-relaxed mode on Apple Silicon — most users won’t want this).
• Easier: uninstall the app (drag to Trash, empty Trash), restart your Mac, reinstall the DMG. The prompt comes back on next launch.

Why the approval is one-shot

macOS Sequoia treats every system extension as a security boundary. The TCC layer remembers your decision per bundle ID forever, so a single misclick on “Don’t Allow” kills the virtual camera until you reinstall. If the approval prompt is missing entirely on a fresh launch, the bundle is already cached in TCC’s database — reinstall is the cleanest reset.

Uninstalling

Drag MeetingDouble out of Applications. Then in Terminal: systemextensionsctl uninstall - dev.ogtay.meetingdouble.cmio. Loops and settings live in ~/Library/Application Support/dev.ogtay.meetingdouble/; delete that folder to wipe everything.