The product: the work stays there, the window comes here

A Mac mini is running a task in the study while you write a report on a laptop in the living room. To check progress, you would otherwise open a full remote desktop, find the app and return to your document. Beam makes the unit of selection a single window: the remote terminal or editor can sit beside the notes in front of you.

The app still runs on its original Mac. Its remote window appears on the current desktop with its own Dock icon and can be switched to with Command-Tab. This article focuses on using one window between two Macs you own. Beam also offers full-screen sharing and guest links, which have different sharing scopes.

Single-window use and recovery based on official guidance. The separate initial setup check applies only when restarting is safe and does not imply automatic task recovery.

The core workflow: bring over the task window from the study

The example below is checking a task terminal on a Mac mini. It is a teaching scenario, not a latency or reliability test.

  1. Make both computers discoverable to each other. The current website requires Apple silicon Macs running macOS Sonoma or later, with Beam installed on both. Start on the same Wi-Fi; connecting from another location requires a separate Tailscale private device network setup. The free tier includes 20 minutes a day and needs an internet connection. Use it to check your own network and apps first. Follow the current client’s sign-in and pairing prompts and select the correct computer.
  2. Grant permissions on the source Mac, then choose a specific window. The official single-window guide says the Mac providing the window needs Screen Recording and Accessibility permissions. Clipboard and local-network capabilities can prompt for their own permissions. In the picker on the computer in front of you, find the Mac mini and select the target terminal. A whole-screen option has a different scope.
  3. Place the window beside your current work. Put it next to the report and switch with Command-Tab. Input goes to the remote app, and dragging the window edges also changes the source window’s size. Your actions therefore affect the real app on the other computer. Check the computer and window before typing a command.
  4. If the window disappears, establish what happened. For an already connected source window, minimizing it, hiding its app or moving to another macOS desktop preserves the same window. Closing the source window generally ends that share. Reopening the same project may create a new window that must be selected again; an identical title does not establish that the old window has recovered.

Run a separate check during initial setup. Before moving the Mac mini somewhere inconvenient to access, use the official checks while no task has started, or after saving and ending tasks so it is safe to restart. Try reading small text, scrolling and selecting the app again. Then restart the source Mac, complete normal login and any required FileVault disk unlock, launch Beam on that Mac, and return to the picker on your current computer to confirm the device appears. This initial setup check is not the next step in everyday task monitoring, and it does not mean an old task or window will resume automatically.

Design lessons: make the object and its changes recognizable

Bring a window into the existing workspace

Checking task progress and writing the report are parts of the same job. Beam puts the remote window into familiar Dock and app-switching behavior, letting you arrange both on one desktop. The useful design principle is to reuse an object people already understand, reducing the steps needed to enter another desktop and locate content. The tradeoff is that windows from two machines can be easier to confuse, so their source still needs to remain clear.

Explain recovery in terms of whether the window still exists

“Gone from view” can mean hidden or closed. In the first case the original object remains; in the second, only similarly named content may remain. Beam’s window documentation separates these cases so people know whether to return to an existing window or select a new one. The same principle applies to documents, devices and tasks: names help people recognize objects, but cannot prove that an object has not been replaced.

Adapt quality to the current content

The official explanation says the default settings adjust sharpness and smoothness for stationary text and moving content, with a manual override available. Reading small terminal text and scrolling a long file call attention to different details. A useful lesson is to provide defaults suited to the task while retaining a clear adjustment path. Check the result with your own display, network and content.