If you are running a modern Mac (including Intel and Apple Silicon M1/M2/M3 chips), you cannot use the Radium’s USB port directly without a driver. Fortunately, you do not need the USB port to send MIDI data.
Connect a standard 5-pin MIDI cable from the port on the back of the Radium 49.
Before installing the driver, make sure your Mac meets the minimum system requirements:
Since you aren't using the USB port for data and power, you must power the Radium 49 using a 9V DC positive-tip power adapter, or by plugging the Radium's USB cable into a standard phone charger wall brick solely for power. m-audio radium 49 driver mac
When the Radium 49 was released, USB was still maturing. To function efficiently, the device relied on proprietary drivers written by M-Audio (then Midiman). These drivers told the computer exactly how to interpret the data coming from the specific faders and knobs on the unit.
Some users have encountered an issue where the keyboard appears in the System Profiler as an unknown device. In that scenario, the problem is likely a faulty USB connection rather than a driver issue—try a different USB port, a different cable, or test the keyboard on another computer.
Modern macOS versions require drivers to be digitally signed by Apple. You must bypass system security to install these. If you are running a modern Mac (including
Manually draw a connection between the new device and your USB interface icon.
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Note: If your macOS version is not listed, choose the closest older version. If no drivers are listed, rely on class-compliant drivers. 3. How to Install and Set Up on Mac Follow these steps to connect your to your Mac. Method A: Class-Compliant Setup (Recommended) Before installing the driver, make sure your Mac
If your Mac does not recognize the USB connection, the most reliable workaround bypasses the USB data port entirely. The Radium 49 features a standard 5-pin MIDI Out port on the back panel. This port sends pure MIDI data that never requires software drivers. Equipment Needed:
Use the Radium’s USB port , or use a 9V DC power adapter. 2. Open-Source Driver (Technical)
If you are running an older Mac (pre-2015), you might need the official legacy drivers to ensure stability. Visit the M-Audio Drivers & Updates page. Select as the Product Type. Select Go to product viewer dialog for this item. as the product. Select your macOS version.
As a veteran MIDI controller from the early 2000s, the M-Audio Radium 49 offers a surprising amount of utility, even today. Its feature set includes 49 velocity-sensitive keys, eight assignable knobs, nine assignable sliders, pitch and modulation wheels, and a convenient USB MIDI interface. For producers focused on software synthesis, digital audio workstations (DAWs) like Logic Pro, Ableton Live, or Pro Tools, and even for live performance, the Radium’s many physical controls remain highly functional.
If you encounter issues with your M-Audio Radium 49 driver on Mac, try the following troubleshooting steps: