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

# macobio(4)

introduction to Apple PowerPC onboard I/O bus support

## NAME

**macobio** – introduction to Apple PowerPC onboard I/O bus support

## SYNOPSIS

**macobio0 at pci?**

## DESCRIPTION

The **macobio** device serves as a bridge to many of the onboard devices; it supports the GC, Heathrow, Intrepid, K2, Keylargo, OHare, Paddington, Pangea, and Shasta modules.

OpenBSD provides support for the following devices:

- [aoa(4)](/man/aoa/4.md)

  Apple aoa audio device

- [awacs(4)](/man/awacs/4.md)

  Apple awacs audio device

- [bm(4)](/man/bm/4.md)

  Apple BMAC Ethernet device

- [daca(4)](/man/daca/4.md)

  Apple daca audio device

- [macgpio(4)](/man/macgpio/4.md)

  support for on-board GPIO controllers

- [mc(4)](/man/mc/4.md)

  Am79C940 (MACE) on-board Ethernet device

- [mediabay(4)](/man/mediabay/4.md)

  ATA33 HD controller

- [onyx(4)](/man/onyx/4.md)

  Apple onyx audio device

- [openpic(4)](/man/openpic/4.md)

  OpenPIC interrupt controller

- [snapper(4)](/man/snapper/4.md)

  Apple snapper audio device

- [tumbler(4)](/man/tumbler/4.md)

  Apple tumbler audio device

- [wdc(4)](/man/wdc/4.md)

  WD100x compatible hard disk controller driver

- [wi(4)](/man/wi/4.md)

  WaveLAN/IEEE, PRISM 2-3, and Spectrum24 IEEE 802.11b wireless network device

- [xlights(4)](/man/xlights/4.md)

  Xserve G4 and G5 front panel LEDs

- [zs(4)](/man/zs/4.md)

  Zilog 8530 (ZSCC) serial communications driver

## SEE ALSO

[adb(4)](/man/adb/4.md), [intro(4)](/man/intro/4.md), [kiic(4)](/man/kiic/4.md), [memc(4)](/man/memc/4.md)

## HISTORY

The **macobio** first appeared in OpenBSD 2.8.