The essentials, out of the way.
A quick glance at frame rate and system health. Keep your attention on the game.
Redline 0.2.0 · PUBLIC BETASee how your Mac
really runs your games.
FPS, temperatures and memory, right where you’re playing. A small performance overlay for Apple Silicon Macs.
Keep an eye on the essentials
Less guessing.
More playing.
Watch FPS over a 60-second graph, check your 1% low, and see CPU, GPU and RAM usage without leaving your game.
CPU and GPU temperatures and thermal state help you understand what’s happening when things slow down.
As much detail as you need
Compact for playing.
Full for a closer look.
The whole picture.
Power, clocks, battery and memory breakdown, alongside your game’s own CPU, GPU and memory usage. Full mode also includes swap readings.
Your Mac. Your data.
A menu bar app.
No extra baggage.
No Screen Recording or Accessibility permission needed.
No network requests or data collection. Nothing leaves your Mac.
Developer ID signed and notarized by Apple.
No Dock icon. Works with full-screen Metal games.
Built for testing
Keep the run.
Find the moment.
Every game session saves a CSV log and summary. Close the game to review the run, or mark an interesting moment with ⌃⌥M.
The memory growth check warns when a game’s memory keeps climbing. It helps you investigate a trend: it doesn’t diagnose a memory leak.
See the memory growth check in action
For game developers
Change your build.
Compare your runs.
Run your own build with frame-by-frame FPS, no refresh-rate cap in developer mode, 1% lows, stutter counts, frame-time graphs and GPU time per frame.
Using Unity? The Editor package adds Redline → Build and Run with Redline.
TERMINAL
redline run ./Builds/MyGame.app > run.csv
redline compare before.csv after.csvWithin easy reach.
- Settings
- ⌃⌥R
- Show / hide overlay
- ⌃⌥O
- Add a marker
- ⌃⌥M
Made for your Mac.
Apple Silicon: M1 or newer.
macOS 14 Sonoma or newer.
Administrator account required for FPS readings.
Release notes
Redline 0.2.0
Public beta
Our first public beta is here. Free and open source, for Apple Silicon Macs.
View release on GitHub ↗In this release
- Live FPS graphs for Metal games, with Compact and Full overlay views.
- CPU and GPU temperatures, power and memory readings, plus a memory growth warning.
- Automatic CSV session logs, summaries and keyboard markers.
- Developer tools: frame-by-frame FPS, run comparisons and Unity’s Build and Run with Redline.
Requirements: M1 or newer, macOS 14 Sonoma or newer, and an administrator account for FPS readings.
A few things to know.
Is it free?
Yes. Redline is free and open source under the MIT licence.
Is it safe?
Redline is signed with a Developer ID and notarized by Apple. You can inspect the source code on GitHub.
Does it work with my game?
Redline supports games that use Metal, including App Store, Steam and iPhone/iPad games running on your Mac.
Why can’t I see more than 60 FPS?
Windowed games on macOS are capped at your display’s refresh rate. On a 60 Hz display, that means 60 FPS.
Why does it need an admin account?
macOS only lets administrator accounts read the system log, which is where the FPS reading comes from.