# Requirements

> The Mac, the widget and its firmware, and the cable and terminator a real fixture needs.

- **Runs on:** macOS 15 Sequoia or later, Apple silicon
- **Needs:** An Enttec DMX USB Pro with its DMX/RDM firmware (major version 2)
- **Price:** Free

| What | Needs | Notes |
|---|---|---|
| Mac | macOS 15 Sequoia or later, Apple silicon | No Intel build |
| Interface | An Enttec DMX USB Pro | Others that copy its protocol may open; only a genuine Enttec is checked |
| Firmware | DMX/RDM, major version 2 | It ships with 1.x, which is DMX-only |
| Driver | None | macOS has the driver for its USB chip |
| Line | A terminator in the fixture's DMX output | With RDM switched on at the fixture |
| Network | None | Two checks, both optional ([Privacy](/privacy/)) |

## The Mac

macOS 15 Sequoia or later, on Apple silicon. There is no
Intel build, so an Intel Mac is offered nothing.
Windows and Linux are planned and not started. There is no iPad version: the
widget's USB chip has no way to talk to an iPad.

## The widget and its firmware

RDMBench talks to fixtures through an **Enttec DMX USB Pro**. Plug it
straight into the Mac, not through an unpowered hub. Only one program
at a time can hold the widget, so quit anything else that has it open.

The firmware is the catch, and it shows up on the first run. The widget
ships with a **DMX-only** build. RDM needs the **DMX/RDM** build,
major version 2, flashed once with Enttec's EMU tool; the widget keeps
it after that. Ours arrived as 1.44 and went to 2.4.

| Firmware | What it is | RDMBench |
|---|---|---|
| 1.x | DMX-only | Says so and stops, rather than timing out |
| 2.x | DMX/RDM | The one the bench needs |
| 3.x | RDM sniffer | Says so and stops |

Some interfaces from other makers copy the Enttec protocol, and the
bench may open them. It has only been checked against a genuine Enttec.

## The line

- Plug the fixture into the widget's DMX output, one fixture straight
  off the widget to start with.
- Switch RDM on at the fixture, if it has a setting for it.
- Put a **terminator in the fixture's DMX output**. An unterminated line
  can make a fixture miss requests. The bench here runs a 5-pin cable
  and a 5-pin terminator.

## The network

None. RDMBench works fully offline. It makes two checks when it can,
one for app updates and one for the fixture library, and both can be
turned off ([Privacy](/privacy/)).