A real editor
Multi-tab editing with proper Lua syntax highlighting, line numbers, ⌘S to save, and a minimap. It just feels right.
Now in open beta · v0.1.0
The script editor
The script editor
Roblox always deserved.
A proper multi-tab Lua editor, a curated script hub, custom themes, autoload, and multi-session control — wrapped in a fast, native desktop app.
7Built-in themes
∞Editor tabs
~4 MBDownload size
1 clickMulti-session execute
Everything in one place
Built for people who actually script
Fewer tabs, less friction. The tools you reach for, in a single fast window.
Custom themes
Seven built-in themes plus a live color editor. Tune every token and save your own look.
Script hub
Browse a curated catalog of community utilities and load them into the editor in one click.
My Scripts
Save personal scripts with ⌘S — duplicate names welcome. Your library, organized and searchable.
Autoload
Mark scripts to run automatically the moment a session attaches. Set it once, forget it.
Multi-session
Detect every running session, select all at once, and execute across them together.
How it works
From download to running in minutes
Three steps. No installer wizard, no account signup, no clutter.
Install
Grab the .dmg, drag Catalyst into Applications, and clear the one-time quarantine flag with a single Terminal command.
Unlock
Paste your license key once. It locks to your device, and your remaining time is always visible in Settings.
Attach & run
Pick your sessions from the titlebar, hit Execute, and your autoload scripts fire the moment a session attaches.
Live demo
Not a screenshot. The actual app.
Type in the editor. Switch tabs. Then pick a theme — and watch the whole page change with it.
Output
Themes
Pick a preset — it restyles the editor and this whole website.
Script Hub
Community scripts shared by others. Load one into the editor or save it for later.
UI Library
142 lines · by community
Notify Helper
58 lines · by community
Autoload
Scripts here run automatically when you attach to a session.
welcome.lua
enabled
My Scripts
Your saved scripts. Save the current tab with ⌘S / Ctrl+S.
utils.lua
Saved script
timer.lua
Saved script
Settings
Editor
14
Window
Behavior
License
29d 4h
380f4d300eeedf55
Click around — switch tabs, open Themes, pick a session. The seven presets re-skin this entire website.
Simple pricing
Pick a key, start scripting
One license, locked to your device. Upgrade or extend any time.
All plans unlock the full app. One key, one device.
Get the app
Download Catalyst
Universal build for Apple Silicon and Intel Macs, and a Windows installer. Auto-updates once installed.
macOS
Windows
$
xattr -dr com.apple.quarantine "/Applications/Catalyst.app"
Since Catalyst isn't verified by Apple yet, macOS adds a “quarantine” flag to anything downloaded from the web and falsely reports the app as “damaged.” This command removes that flag so the app opens normally — it's completely safe, and you only need to run it once.
Roadmap
Where Catalyst is heading
Shipped, in flight, and up next — updated with every release.
Shipped
Multi-tab editor, themes & script hub
v0.1.0
Shipped
Autoload + multi-session execute
v0.1.0
In progress
Windows build
Same app, same key
In progress
Online checkout
Instant key delivery
Planned
Bigger script hub catalog
More community scripts
Questions
Good to know
It's a desktop Lua script editor and session manager for Roblox — a proper multi-tab editor with a script hub, autoload, custom themes, and multi-session control, all in one native app.
No — the download is fine. Catalyst isn't notarized by Apple yet, so macOS tags any browser download with a "quarantine" flag and shows a misleading "damaged" message. After dragging the app to Applications, open Terminal and run
xattr -dr com.apple.quarantine "/Applications/Catalyst.app", then launch it normally. You only do this once. (Right-clicking and choosing Open does not work for the "damaged" variant — the Terminal command is the reliable fix.)Pick a plan, get a key, paste it into the app, and you're in. Your remaining time is always visible in Settings. A key activates on first use and stays tied to that machine — if you switch computers, just reach out and we'll sort it.
Yes. Your saved scripts, custom themes, autoload list, and editor tabs are stored locally and persist across updates.
macOS on Apple Silicon or Intel. The download is a single universal build. A Windows version is in progress.
Online checkout is coming soon. In the meantime, you can purchase a key from one of our official resellers.
Ready to script smarter?
Download Catalyst, grab a key, and make the editor the fun part again.