VirtualScreen
A macOS menu bar utility that captures a region of your screen and mirrors it in a separate window.
Why
Sharing an ultrawide monitor on a video call looks terrible. The content gets squashed into a tiny strip because Zoom, Google Meet, and others fit the entire display into a 16:9 video frame. There's no built-in way to share just a region of your screen — only full screens or specific windows.
VirtualScreen fixes this. Select a 16:9 (or any) rectangle on your ultrawide, and it mirrors that region into a standalone window you can share instead. Your audience sees a crisp, full-size view of exactly what you want to show.
Install
Download the latest VirtualScreen.dmg from Releases, open it, and drag VirtualScreen to Applications.
On first launch, macOS may block the app because it's not notarized. Right-click the app and select Open to bypass. If you see "damaged and can't be opened", run:
xattr -cr /Applications/VirtualScreen.app
Usage
- Click the rectangle icon in the menu bar
- Use Select Region to drag a capture area, or pick a preset from Region Size (720p, 1080p, 4K)
- A green border marks the active region — drag the handle at the top to reposition it
- The output window appears with the mirrored content. Share this window in your video call.
- Use FPS to switch between 15 / 30 / 60 fps. 30 is the default.
The output window, region border, and drag handle are all excluded from the capture, so they never appear in the mirrored output.
Requirements
- macOS 14+
- Screen Recording permission (prompted on first run)
Build from source
# Run directly swift build && .build/debug/VirtualScreen # Or bundle as a .app ./bundle.sh open VirtualScreen.app