Raymol is the open-source PyMOL engine rebuilt for Mac, iPad, and iPhone: real-time ray tracing and materials, on-device protein design and structure prediction, and Claude at the controls.
Gold, glass, marbleNine materials, on any layer.
Light that looks realShadows and depth, side by side with PyMOL.
Design and fold, on-deviceProteinMPNN and Boltz-2, with no server.
Let Claude driveClaude drives Raymol through its built-in MCP server.Mac direct download & Homebrew
Built on the real PyMOL engine · 60 fps Metal rendering · Mac · iPad · iPhone · Free
A Metal rendering engine replaces OpenGL, adding real-time shadow mapping, ambient occlusion, and order-independent transparency at interactive frame rates — and, new in 1.12, materials from polished gold to glass that bends light. On supported Apple Silicon, hardware ray tracing is available for higher-quality lighting, and reflective materials then reflect the structure itself.
Open the same .pse in Raymol and PyMOL: Raymol's Metal viewport adds shadows, ambient occlusion, and antialiasing that PyMOL's default OpenGL viewport doesn't show in real time.
Color says what something is; a material says what it's made of. Give each cartoon, surface, stick, and sphere layer its own finish, and your colors stay exactly as they are.
Matte, plastic, metallic, glass, frosted glass, jelly, marble, clay, or rubber, set per object, and each layer of an object can have its own.
Gold, Copper, Bronze, Steel, Chrome, Marble, and Clay. A Look sets a layer's material and color together, ready to fine-tune from there.
Glass, frosted glass, and jelly refract what's behind them through the shape of the surface, so a ligand seen through glass looks like it's inside.
Show side chains on a cartoon and they take on its material automatically, so a gold backbone gets gold side chains. Give them their own any time.
Each layer row has a Material menu, with a Look chip beside it. Custom… opens that material's own knobs — reflection, tint, roughness, and more — for that layer only.
Plastic, metallic, and the glass rim reflect the background or a neutral studio, and with Metal ray tracing on, the structure itself. Materials are saved in your sessions and scenes.
Also in 1.12: Roll spins at a constant speed in movies, fog fades to the background color instead of black, and a set of rendering fixes. Release notes →
Raymol runs ProteinMPNN sequence design and Boltz-2 structure prediction on your device's own GPU. No server round-trip, no export and re-import, no account: results land right in your session.
Score every residue and color the structure by how well each one fits. Hover any position for its full 20-amino-acid propensity, click to mutate and Raymol re-scores and repacks the side chain live, or redesign a whole selected region with the rest held fixed.
Type or select a sequence and fold it right in Raymol. A live tray tracks each run with a per-phase ETA, and confidence metrics like pLDDT and PAE stay with the object, ready to color by.
Design and Predict are in every build: the Mac App Store, the direct download, Homebrew, and the App Store for iPhone and iPad.
Raymol ships a built-in MCP server, so the Claude desktop app and Claude Code can drive it directly — fetch structures, run commands, change representations, and capture the viewport through real tool use. Open Connect ▸ Connect an AI app… and set it up in one click. No API key needed — it uses the Claude you already have.
Available in the Mac direct-download and Homebrew builds. The App Store builds — Mac, iPhone, and iPad — don't include the MCP server, which App Store sandboxing doesn't allow.
One Swift + Metal codebase, native on each device. Open a .pse on the Mac, keep working on iPad, review it on your phone.
The iPhone build is the complete app — the same engine, representations, settings, command language, and export as the Mac, on the device in your pocket.
Built for touch: one finger to rotate, two to pan, pinch to zoom, twist to roll, combined in a single gesture. On Mac, trackpad gestures map to the camera, with the classic per-button mouse mode also available.
A live inspector exposes per-representation controls — cartoon tube radius, surface quality, stick and sphere scale, transparency, material, per-object color — plus a scene card for lighting, shadows, and antialiasing. Drag a slider and the viewport updates. The familiar A/S/H/L/C menus are a tap away.
Restyle the entire interface in a tap. Four themes ship built in — and Theme Studio lets you craft your own. Your theme follows you across Mac, iPad, and iPhone.
Render publication-quality stills up to 4K with transparent backgrounds, and author camera, state, and scene movies — exported to MP4 or GIF.
A color-accurate sequence viewer synced both ways with the 3D view, plus a visual selection builder with live atom counts and on-screen measurements.
The genuine PyMOL engine with Python 3.13 — full commands, 800+ settings, PDB/mmCIF/SDF/MOL2, RCSB fetch, and .pse sessions, with a live console.
Yes — free on every platform. On Mac: the Mac App Store, a direct download, or Homebrew. On iPhone and iPad: the App Store.
No. The iPhone app is the complete Raymol — same engine, same rendering, same full feature set as the Mac and iPad.
Raymol embeds the genuine open-source PyMOL engine, so your commands, settings, file formats, and .pse sessions work as expected.
They're the same app. The Mac direct-download and Homebrew builds also include the built-in MCP server, so Claude can drive Raymol. The App Store builds — Mac, iPhone, and iPad — leave that out because App Store sandboxing doesn't permit it. The engine, rendering, and every other feature are identical.
Raymol delivers fast rasterized rendering with shadows, ambient occlusion, and MSAA on every supported device, and materials work on all of them. Real-time ray tracing is available on supported Apple Silicon; with it on, reflective materials also reflect the structure itself.
Three ways to install on Mac, one tap on iPhone and iPad — the same app and the same engine on every screen.
One-click install and updates through the App Store.
Install and update from the command line.
brew install --cask javierbq/raymol/raymol
Same app, two builds. The direct-download and Homebrew builds are identical and include the built-in MCP server, so Claude can drive Raymol. The Mac App Store build is the same app without that integration — App Store sandboxing doesn't allow it. Everything else is the same.
One universal app for iPhone and iPad — install and update through the App Store.
