iMac G5: External ports and connectors

Learn about the external ports and connectors on the iMac G5 computer. All ports and connectors discussed in this document are located on the Input/Output (I/O) panel on the right side of the back of the computer.

This article has been archived and is no longer updated by Apple.

I/O ports

Audio line in port

Analog audio line input minijack; up to 16-bit stereo and 44.1 kHz sampling rate.

The external sound input jack is a 3.5 mm mini phone jack. The sound input jack accepts line-level stereo signals. It also accepts a stereo miniplug-to-RCA cable adapter for connecting stereo equipment to the computer.


Sound output port

This headphone/line output features a D/A converter that supports 24-bit, 32-96 kHz audio for both digital optical audio and analog audio output. For analog headphone / line output a standard audio cable with 3.5mm metal plug should be used. For digital audio, a fiber optic cable with 3.5mm plastic or nylon optical plug should be used.

For more information about the sound output port.


Video Out Port

Using the video out port, you can mirror video with a compatible VGA display using the Apple VGA Display Adapter.

You can also use the video mirroring feature with a television or projector that has S-video or composite video connectors when you use the Apple Video Adapter.

The video output port allows video mirroring. Video mirroring allows you to see the same image that is on the iMac G5's flat-panel display on an external monitor, television or projector.

For more information about the video out port, see this document .


Three USB (Universal Serial Bus) 2.0 ports

The back of the iMac G5 has a total of three USB 2.0 compliant ports. You can connect both USB 2.0- and USB 1.1-compliant devices to these ports. The keyboard also contains a USB hub with two USB 1.1-compliant ports.

All the USB ports use USB Type A connectors, which have four pins each.

The USB 2.0 ports support both low-speed, full-speed and high-speed data transfers, at up to 1.5 megabits per second (Mbit/s), 12 Mbit/s, and 480 Mbit/s respectively.


Two FireWire 400 ports

The iMac G5 features two 400 Mbit/s FireWire (IEEE 1394) ports. 400 Mbit/s is a theoretical maximum load, and actual rates will vary. This port is used by iPods, as well as third-party devices such as video cameras or external drives.

The iMac G5 computer supports Target Disk Mode (TDM).


Modem port (on some models)

Some iMac G5 computers come with a built-in 56K V.92 modem.

Tip: Some iMac G5 models do not include a modem.

The port for the modem on the I/O panel is a telephone connector, also known as an RJ-11 connector.

The modem has the following features:

  • Modem bit rates up to 56 kbps, and supports V.90, V.92 and K56flex modem standards. (Actual modem speed depends on connection rate and other factors.)
  • Group 3 fax modem bit rates up to 14.4 kbps.
  • The modem appears to the system as a serial port that responds to standard AT commands.
  • The modem provides an analog sound output for monitoring the progress of the modem connection.


Ethernet port (10/100 Base-T)

The iMac G5 has a built-in 10/100 Mbit/s Ethernet port. The iMac G5 computer can be connected to an Ethernet cable from a cable or DSL modem, hub, switch, or router, or to another Macintosh computer. The connected device can be either a 10Base-T or a 100Base-TX device; the port automatically detects which type of device is connected. You don't have to use an Ethernet crossover cable to connect to other Ethernet devices.


Power Button

This button is used to turn the computer on, turn the computer off, or reset the computer. Press and hold this button to reset the computer during troubleshooting.


Power Port

This port is for connecting the iMac G5's power cord.


Security Slot

This slot is designed to fit a lock and cable to prevent theft. Such locks are available through the Apple Store.

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