Native macOS developer tool

See the launch.
Find the signal.

LaunchTrace watches what happens when a Mac app starts and runs, then cuts through the system noise so the events worth investigating stay visible.

Download LaunchTrace — Free See what it does

What LaunchTrace does

Launch an app. Keep the useful evidence.

A normal macOS launch can produce a flood of unrelated framework chatter. LaunchTrace captures the session, keeps the structural events, surfaces actionable warnings, errors and crashes, and still lets you inspect the raw stream when you need it.

01 / PRE-ARM

Catch the beginning.

The log stream is armed before the target app launches, so very early launch diagnostics are not missed.

02 / FILTER

Suppress the noise.

Actionable view removes routine Apple framework chatter while keeping the launch and runtime events that deserve attention.

03 / RAW LOG

Nothing is hidden.

Switch to Raw Log whenever you want the complete captured stream instead of the filtered diagnostic view.

04 / FRESH LAUNCH

Start from a known state.

Fresh Launch can terminate an existing instance and start a clean launch session for repeatable testing.

05 / HISTORY

Keep recent sessions.

Recent launch sessions stay available so you can return to prior diagnostics without losing the current trace.

06 / COPY

Take the evidence with you.

Copy an individual event or a clean session summary when you need to document, compare or troubleshoot a problem.

Typical workflow

Choose. Trace. Inspect. Fix.

1. Choose an appSelect the macOS app you want to test.

2. Start tracingLaunchTrace arms capture and starts the app.

3. Inspect eventsSearch, filter and open the details that matter.

4. Keep the resultCopy an event or summary, or revisit the saved session later.

● TRACE ACTIVE

00:00.000

SESSION

Trace started and log capture armed.

00:00.182

PROCESS

Target application launched and PID captured.

00:00.417

WARNING

Application-authored warning surfaced while routine framework messages remain suppressed.

00:00.615

ERROR

Actionable launch or runtime failure remains visible for inspection.

Built for investigation

Use it when “it didn’t work” is not enough.

LaunchTrace is the companion for the moment after a successful build: the app launches, something behaves strangely, and you need a clean view of what actually happened.

See what happened at launch.

LaunchTrace is free. Download it, trace a launch, and keep the useful signal.

Download LaunchTrace — Free User Guide Support

See the launch.Find the signal.