A native macOS menu-bar app to control HyperX QuadCast 2 S RGB lighting on macOS: solid color, brightness, and software animations (breathing, cycle, rainbow, strobe, pulse, wave, fire, police, party).
The QuadCast 2 S has no macOS software and does not store color in firmware, so GlowCast drives it continuously via IOHIDManager and runs at login. Unplug/replug auto-recovers.
bash Scripts/make_app.sh
open build/GlowCast.app # or: cp -R build/GlowCast.app /Applications/ && open /Applications/GlowCast.appA mic.fill icon appears in the menu bar. Click it to pick color, mode, brightness, save
presets, and toggle Launch at login.
- Device
03f0:02b5(QuadCast 2 S controller). RGB is a HID vendor collection (usage page0xff13, usage0xff00) on interface 1 — matched by VID+PID then filtered by that usage pair (it is a non-primary usage, so primary-usage matching misses it). - Each ~30 Hz frame sends a header packet
[0x44, 0x01, 6]plus 6 data packets[0x44, 0x02, idx, … 108 RGB triples]viaIOHIDDeviceSetReport(report id 0, 64 bytes). - Verified on hardware: write-only works (no response reads needed) and no Input
Monitoring permission was required for the signed
.appopening the vendor collection. - Animations are produced in software (the device exposes only solid mode).
swift test # 30 unit tests: RGBColor, PacketBuilder (golden device bytes), Animator, Settings
swift build # build the executable
bash Scripts/make_app.sh # bundle + ad-hoc sign GlowCast.app
- macOS 13+. Not available on the Mac App Store (the sandbox forbids this HID access) — distribute as a signed/notarized direct download instead.
- Protocol reverse-engineered with help from Ors1mer/QuadcastRGB (GPL-2.0). Credit to Ors1mer.
- Future (v2): spatial "wave" effects across individual LEDs (needs physical LED-order mapping); independent upper/lower zones.
MIT — see LICENSE. Protocol research credit: Ors1mer/QuadcastRGB.