Redline 0.2.0-public-beta

First public beta of Redline: a free, open-source performance overlay for Apple Silicon Macs.

See FPS, CPU, GPU, RAM and temperatures in a small overlay on top of any game, with no Screen Recording or Accessibility permission.

Install

1. Download Redline-0.2.0.dmg below.
2. Open it and drag Redline to Applications.
3. Open Redline and click Open when macOS asks about a downloaded app.

Redline is signed with a Developer ID and notarized by Apple.

What's in it

Overlay

• FPS for any Metal game (App Store, Steam, iPhone/iPad games on Mac), with a 60-second graph
• CPU and GPU usage, CPU and GPU temperatures, thermal state
• RAM with an app / wired / compressed / cached breakdown, memory pressure, swap and swap activity
• Power draw, clock speeds, battery drain, GPU memory
• The game's own CPU, GPU, memory, disk activity and threads
• Memory growth check: warns when a game's memory keeps climbing
• Compact or Full view, in any corner of the screen

Testing

• Record sessions: a CSV log and a summary saved for every game (Settings → Record sessions)
• Session summary when a game closes: average FPS, 1% low, max temperature, peak memory and more
• Markers to flag moments in the log

Shortcuts

• ⌃⌥R settings · ⌃⌥O show/hide overlay · ⌃⌥M add marker

For developers

• redline run ./MyGame.app: frame-by-frame FPS with no refresh-rate cap, 1% low, stutter count, frame-time graph and GPU time per frame (for your own builds without Hardened Runtime, e.g. Unity development builds)
• redline compare before.csv after.csv: side-by-side comparison of two runs
• Unity Editor package: Redline → Build and Run with Redline (install instructions)
• Terminal command installer (preview)

Requirements

• Mac with Apple Silicon (M1 or newer)
• macOS 14 Sonoma or newer
• An administrator account for FPS readings (other stats work on any account)

Known limitations

• Tested on a MacBook Air M2. Other Apple Silicon Macs should work; if a reading is missing or wrong, please report it.
• Clock speeds are only read on M1 and M2 chips; on other chips that row is hidden.
• Windowed games are capped at your display's refresh rate by macOS.
• 1% low, stutters, frame-time graph and GPU time need redline run; for other games macOS reports FPS about once a second.
• Some games capture the whole keyboard, so shortcuts may not work inside them. Use the menu bar icon instead.

Feedback

• Ideas: feedback form, no account needed
• Bugs: Report an Issue in Redline's settings (it fills in your Mac model), or open an issue

Developed by Han Industries · MIT licence

Redline 0.1.0

First release of Redline, a free performance overlay for Apple Silicon Macs.

• FPS for any Metal game (App Store, Steam, iPhone/iPad apps on Mac)
• CPU, GPU, RAM, chip temperature and thermal state
• Overlay in any corner, settings with ⌃⌥R
• No Screen Recording or Accessibility permission needed

Install: open the DMG and drag Redline to Applications. The first time you open it, macOS will block it because it isn't signed with a paid Apple Developer ID. Go to System Settings → Privacy & Security → Open Anyway. See the README for details.

Requires macOS 14+ on Apple Silicon.