Prismatic is a native macOS menu-bar app that controls SteelSeries Arena 7 RGB lighting directly over USB — no SteelSeries GG required.
Features
- Independent left / right speaker colors
- Fetch a color palette from your wallpaper
- Hardware brightness and instant on/off
- Custom inline color picker, launch at login, built-in update check
- Signed with Developer ID and notarized by Apple
Install
Homebrew
brew install szamski/tap/prismaticManual — download Prismatic.dmg, open it, and drag Prismatic.app into Applications. A plain Prismatic.zip is attached as well.
Requirements
- macOS 14 (Sonoma) or later
- Arena 7 connected over USB (lighting is USB-only)
- Quit SteelSeries GG if it is running
The .zip holds the notarized app and launches cleanly. The .dmg is an unsigned convenience installer — if macOS prompts on first open, right-click the DMG and choose Open.