A Metal-native macOS terminal engineered for Claude Code, Codex, and every CLI agent you run. Insanely fast. Impossible to crash. ~0% CPU when you're not typing.
Download for macOSFree · v0.1.0 · Notarized by Apple · macOS 14+ · Apple Silicon · ~3 MB
You upgraded your editor, your shell, your AI. But the box you run it all in is the same laggy, bloated, crash-prone window it's always been. Rustyyy closes every one of those papercuts.
The first terminal designed around the AI-agent workflow instead of patched to tolerate it. Paste a wall of text into Claude Code and regret it? Hit ⌘⌫ — the whole input line, gone in one keystroke. Plus Shift+Enter that just works, image→.png paste your agent can read, and a banner the second a background run finishes.
A 3 MB binary that embarrasses terminals 100× its size — render-on-demand, whole-frame damage coalescing, occlusion pausing, an adaptive 30/60/120 Hz cadence. Measured on an Apple M4 — full methodology below.
Anybody can claim "fast." We publish exactly how every number is measured — the same fixed workload, the same machine, re-run on every release. No cherry-picking, no mystery hardware.
The sixty-second self-check: install Rustyyy, open Activity Monitor, and watch it idle at ~0% CPU and under 40 MB of memory. The speed, you'll feel on the first keystroke.
Most terminals are one malformed escape sequence from a crash. Rustyyy's core is fuzz-hardened on every commit and panic-isolated per tab. The worst case is gibberish on screen — never a lost session.
Beautiful, the Apple way.
Full-color emoji, seamless box-drawing, and a cursor that fades, glides, and goes hollow when you click away.
Tabs that don't take each other down.
Every tab is its own crash dome with honest, signal-accurate exit markers. ⌘T · ⌘W · ⌘1–9.
10,000-line scrollback, searchable.
Hit ⌘F for live regex search across your whole history — find that one line in a flood instantly.
.png path pastemacOS 14 (Sonoma) and later, on Apple Silicon Macs. It's built directly on Metal, Core Text, and AppKit — macOS-only by design, and that focus is exactly why it's this fast and this native.
Not yet — and we'd rather say so than surprise you. Full input-method support — the candidate window you use to type Chinese, Japanese, and Korean — is the next major feature on the roadmap. Today Rustyyy is built for English and layouts where every character is a single keypress. If you live in CJK input, this is the one to wait for.
Yes — that's the whole point. Shift+Enter for multi-line prompts works out of the box, image paste hands your agent a readable file path, and a finished agent in a background tab pings Notification Center.
Rustyyy ships one carefully-tuned palette and intentionally has no theme system — fewer knobs, one beautiful default. You can set your font, size, padding, cursor, scrollback, shell, and the glass opacity/blur in a simple TOML file.
Yes, and it's enforced in CI two different ways: fuzzing under AddressSanitizer on every commit, plus a stable-toolchain test that proves no byte stream can panic the emulator. Crashes are also isolated per tab.
No — sessions live as tabs, with full per-tab crash isolation. Tabs cover the multi-session workflow.
The numbers come from a fixed benchmark: a 128 MB ANSI flood through the terminal, measuring wall-clock throughput, p99 latency per 64 KB chunk, memory after the flood, and idle CPU — re-measured on the same Apple M4 for every release. And two of the claims you can verify yourself in sixty seconds: open Activity Monitor and watch Rustyyy idle at ~0% CPU and under 40 MB of memory. The rest you'll feel.
Yes. Rustyyy is code-signed and notarized by Apple, so it opens with a single click — no Gatekeeper warnings. It's a native app built on Apple's own frameworks (Metal, Core Text, AppKit): one small 3 MB binary, not a bundled browser. And the code is fuzzed under AddressSanitizer in CI on every commit, with warnings treated as errors.
Verify your download — SHA-256:499bc8426b54e651cb1110db5cc3cd060ec23342340eb2b3894c9658135da1dc
Free to download. A 3 MB app. Open the DMG, drag to Applications, done — no Gatekeeper warnings. macOS 14+ · Apple Silicon.