---
name: "aplmca"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["openbsd"]
url: "https://new.carta.tech/aplmca"
---

# aplmca(4)

Apple MCA controller

## NAME

**aplmca** – Apple MCA controller

## SYNOPSIS

**aplmca\* at fdt?**

## DESCRIPTION

**aplmca** is a driver for the MCA controller integrated on various Apple SoCs. This controller serializes audio data streams received from the [apldma(4)](/apldma/4.md) DMA controller and sends these out as I2S/TDM streams on the audio interfaces of the SoCs.

## SEE ALSO

[aplaudio(4)](/aplaudio/4.md), [apldma(4)](/apldma/4.md), [aplnco(4)](/aplnco/4.md), [intro(4)](/intro/4.md)

## HISTORY

The **aplmca** driver first appeared in OpenBSD 7.2.

## AUTHORS

The **aplmca** driver was written by Mark Kettenis ⟨*kettenis@openbsd.org*⟩.