attn LED 1.0 Mac

Automatic app detection is the engine that drives attn LED from the moment you launch it. The utility monitors your notification stream and fires the MacBook's built-in camera LED whenever a registered application demands your attention — no sounds, no banners, just a persistent green blink that won't stop until you open the offending app.

Filtering the noise

The blink applies to a list you control. Slack, Mail, Messages, Discord, Teams and Telegram are the obvious candidates, and attn LED lets you restrict alerts to those names alone. Everything else stays silent. The LED keeps pulsing while the notification sits unread, so you can glance at the hardware light without leaving whatever full-screen document or terminal session holds your focus.

When the light stands down

Version 1.0 already ties into macOS Focus and Do Not Disturb — if the system says quiet hours, the LED stays dark. The same restraint kicks in automatically during FaceTime calls and video conferences, preventing a blinking light from becoming a distraction mid-meeting. The interface ships in English and the binary runs native on both Apple Silicon and Intel Macs, asking only for macOS 12 or later.

Code in full screen, finally tapped on the shoulder

Writers and developers who spend hours inside a single full-screen app tend to notice the LED first. They already keep notification banners off, so the blink becomes the only tap on the shoulder they actually see. Attn LED also suits anyone working across a room from a docked MacBook — the green dot is visible from across a desk or a studio, which makes it practical for music producers, video editors and designers who step away from the keyboard but still need to know when a client message lands.

Users who run Focus Mode with a narrow allow-list get the tightest integration. Instead of wondering whether Slack got through the filter, they glance at the camera housing. The light either blinks or it doesn't. That binary signal removes the urge to check the screen every few minutes, which is the whole point of the tool.

A message-to-reply workflow

Imagine a Thursday morning with a writing deadline. You enable Do Not Disturb, launch your text editor in full-screen, and set attn LED to watch only Mail and Telegram — the two channels your editor uses for urgent notes. An hour in, the camera LED starts pulsing. You ignore the first few blinks while finishing a paragraph, then swipe to Mail, read the query, and reply. The LED stops the moment Mail becomes the active app.

After sending the response, you switch back to the editor. The light stays dark. No Dock badge distracted you, no slide-in preview broke the sentence you were composing. The entire interruption was a hardware signal you could process without shifting context until you were ready. Later that afternoon, a FaceTime call comes in; the LED pauses its monitoring automatically and resumes only after you hang up.

It watches nothing until you tick that first app

The first stop after installation is the app-allow list. By default, attn LED watches nothing — it needs explicit instruction. Open preferences and tick the communication apps that justify an immediate interruption. Start with one or two. Adding too many defeats the purpose because the LED loses its meaning if it blinks for every newsletter or casual mention.

Next, test the behaviour during a video call. Launch FaceTime or your usual conferencing app and confirm that the LED suppresses alerts. The automatic detection works without configuration, but verifying it once removes the mental friction of wondering whether a client will see a blinking light during a screen share.

Finally, consider where the MacBook sits on your desk. The camera LED is small, so angle the lid or adjust your external monitor layout so the green dot falls within peripheral vision. A docked laptop pushed to the far left edge of a wide desk can hide the signal. A slight rotation of the machine often makes the difference between noticing a blink and missing it entirely.

• macOS 12 or later
• Apple Silicon or Intel (64-bit)