Radioform
Radioform is a free, open-source system-wide equalizer for macOS.
What Radioform is
Radioform is a free, open-source system-wide equalizer for macOS. It routes audio from Mac apps through a virtual output device and EQ engine to selected speakers or headphones. Its ten bands span 32 Hz to 16 kHz, with adjustable gain and Q. Built-in presets include Electronic, Acoustic, Classical, Hip-Hop, Pop, R&B, Rock, and Flat; you can also save custom curves and name them for the headphones they were made for. A limiter and preamp are described as catching clipping when EQ is pushed hard. Radioform switches audio devices without restarting and keeps EQ active as the output changes. It runs on Apple Silicon and Intel Macs with macOS 13.0 Ventura or later. The maker reports under 1% CPU usage on Apple Silicon and no audible delay, and says the app collects no data. Releases are signed and notarized by Apple, and updates use Sparkle. Radioform is licensed under GPLv3; its audio engine uses C++, while the menu bar app is native Swift and SwiftUI with macOS CoreAudio.
Good
- System-wide audio routing through an EQ engine
- Ten bands with adjustable gain and Q
- Includes eight built-in presets
- Switches output devices without restarting
- Open source under GPLv3
Watch out
- Requires macOS 13.0 Ventura or later
- No per-app controls
Who it suits
Radioform suits Mac users who want system-wide equalization with presets or custom curves for particular headphones. It supports Apple Silicon and Intel Macs running macOS 13.0 Ventura or later.
Verdict
Radioform provides system-wide EQ, presets, and custom curves in a free macOS app. Check its minimum OS requirement and lack of per-app controls before choosing it.
Plans and prices
From Radioform's own pricing page, checked 4 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | GPLv3 · no subscription |
The facts
Each one read from Radioform's own pages, with the date it was checked.
What it does
- Compatibility
- Radioform requires macOS 13.0 Ventura or later and runs on Apple Silicon and Intel Macs.checked 4 Oct 2026
- Custom curves
- Users can save custom EQ curves and name them for the headphones they were made for.checked 4 Oct 2026
- Equalizer
- The equalizer has ten bands spanning 32 Hz to 16 kHz, with adjustable gain and Q.checked 4 Oct 2026
- Implementation
- The audio engine is written in C++, while the menu bar app is native Swift and SwiftUI and uses macOS CoreAudio.checked 4 Oct 2026
- License
- Radioform is open source under GPLv3.checked 4 Oct 2026
- Limiter
- A built-in limiter and preamp are described as catching clipping when EQ is pushed hard.checked 4 Oct 2026
- Performance
- The maker reports under 1% CPU usage on Apple Silicon and no audible delay.checked 4 Oct 2026
- Presets
- Built-in presets include Electronic, Acoustic, Classical, Hip-Hop, Pop, R&B, Rock, and Flat.checked 4 Oct 2026
- Privacy
- The maker states that Radioform collects no data.checked 4 Oct 2026
- Purpose
- Radioform is a free, open-source system-wide equalizer for macOS.checked 4 Oct 2026
- Signing and updates
- Releases are signed and notarized by Apple, and updates come through Sparkle.checked 4 Oct 2026
- System audio
- It routes audio from Mac apps through a virtual output device and EQ engine to the selected speakers or headphones.checked 4 Oct 2026
Where it runs
- Device switching
- Radioform can switch audio devices without restarting and keeps the EQ on as the output changes.checked 4 Oct 2026
The company
- Maker
- The site credits Pavlos RSA as the maker and lists [email protected].checked 4 Oct 2026
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