Remote display control
Blackscreen is a desktop client for operators who need to lock down a workstation display, input, and messaging — quietly, from a single panel.
Every capability in the client, shown as it appears on the workstation.
A borderless, always-on-top layer covers every connected display. No window chrome, no taskbar bleed-through — a clean black field across the full desktop.
Block input at the operating system level while the screen is active. Operators toggle keyboard and pointer independently from the device dashboard.
Push a titled message over the black screen — instructions, warnings, or hold notices — without lifting the overlay or unlocking input.
Your backend sends commands over HTTPS to change device state — black screen, input lock, and messages — without touching the machine directly.
Operators sign in through the client. Tokens are stored in the OS keychain — never written to disk in plain text — with automatic refresh and logout on failure.
Managed machines stay ready. Launch on boot, check for updates on startup, and install new versions without interrupting the operator workflow.
Environments where the display must be controlled, not just observed.
Blank auxiliary displays during sensitive briefings while keeping the operator station under central command.
Lock candidate screens between sessions, push instructions, and block input without physically attending each desk.
Take a shared machine offline visually during maintenance or content rotation — input blocked, screen dark.
Guide a user through a fix while their screen shows only what you want them to see.
Pause a class uniformly — one command, every monitor, every keyboard — then resume when ready.
Reduce shoulder-surfing and unauthorised interaction on workstations handling restricted material.
Per-seat licensing for teams that manage remote displays. Volume discounts available.
Starter
$9/seat/mo
Up to 25 managed devices
Team
$6/seat/mo
26–250 managed devices
Enterprise
Custom
250+ devices or on-premise
Or write to sales@shadowgrow.com
Install the desktop client on the machine you intend to manage.
Latest release: v1.1.8
After installing, open About in the app and confirm it shows v1.1.8.
Do not double-click the .exe inside the ZIP. Right-click the ZIP → Extract All → open the extracted folder → run Blackscreen_v1.1.8.exe or Run-Blackscreen.bat.
If SmartScreen appears, click More info → Run anyway. If the app does not open, end all Black Screen Controller tasks in Task Manager and try again from the extracted folder.
First launch blocked? If macOS says it “could not verify” the app, click Done, then right-click the app → Open → Open again.
Apple Silicon build. You can also allow it in System Settings → Privacy & Security → Open Anyway, or run in Terminal (adjust the path if needed):
xattr -cr "/Applications/Black Screen Controller.app"
Download .dmg