Apollo Twin Support Information

Apollo Twin

This page is dedicated to Apollo Twin compatibility and support. The following information is subject to change and may not always be up to date due to OS and DAW updates, or other factors beyond Universal Audio's control.

Last Updated: December 15, 2014

Jump to:
Latest News & Updates Support Videos General Info
Quick Start System Requirements Compatibility
Setting I/O Levels General Usage Notes Thunderbolt Notes

Latest Technical News

Please review the information on this page carefully before installing or using Apollo Twin.

  • UAD plug-ins must be re-authorized after updating UAD software. To authorize UAD plug-ins, open the UAD Meter & Control application’s Plug-Ins panel and click the “Authorize Plug-Ins” button, then double-click the downloaded UAD authorization file.
  • For compatibility information about Mac OS X Yosemite, click here.
  • Apollo Twin is compatible with other UAD devices when using UAD v7.7.1 and higher. See the compatibility section below for details.
  • Console input labels ("scribble strips") can be changed in UAD v7.7.1 and higher. Simply click any input name (at the bottom of each input channel strip) to rename the input.
  • This page is routinely updated with the latest support information. For optimized operation, review this page regularly.

Support Videos to Help You Get Started


“Apollo Twin

Click here for the Apollo Twin Start Video

Check out our support videos blog for more videos to help you set up and use Apollo Twin:

  • My.Uaudio – Creating and navigating your My.Uaudio account
  • Console – An overview of Apollo's Console application
  • Pro Tools – Setting up Apollo with Avid Pro Tools
  • Logic Pro – Setting up Apollo with Apple Logic Pro
  • Cubase – Setting up Apollo with Steinberg Cubase
  • Live – Setting up Apollo with Ableton Live

General Information

Apollo Twin documentation

After software installation, all Apollo Twin and UAD operation manuals are at this location on the startup drive:

  • Macintosh HD/Applications/Universal Audio/

    Tip: After software installation, user manuals can also be accessed from the "Help" menu in the Console application, or by clicking the "View Documentation" button in the Help panel within the UAD Meter & Control Panel application.

Apollo Twin operation manuals can also be downloaded here:

More information

Apollo Twin System Requirements

    Thunderbolt Systems

    • Apple Mac computer with available Thunderbolt or Thunderbolt 2 port
    • Mac OS X 10.8.5 Mountain Lion or 10.9.x Mavericks
    • Internet connection to download software and authorize UAD plug-ins
    • Compatible VST, Audio Units, RTAS, or AAX 64 plug-in host DAW software
    • 4 gigabytes available disk space
    • Thunderbolt cable (sold separately)


  • Operating systems not listed above are untested. Although untested operating systems may work, they are not supported by UA. Prior UAD software for older operating systems and discontinued UAD products is available in the UAD software archives.

Apollo Twin Compatibility

Computer Compatibility

  • Apollo Twin is compatible with Mac models that have an available Thunderbolt or Thunderbolt 2 port. The Mac must meet the minimum system requirements listed above.
  • Apollo Twin is not compatible with Windows PC computers. Apollo and Apollo 16 are available for PC-equipped studios.

UAD Device Compatibility

  • Apollo Twin can be used concurrently with UAD-2 Satellite FireWire, UAD-2 Satellite Thunderbolt, and/or UAD-2 PCIe QUAD/OCTO cards in the same computer system within the constraints listed below:
    • A maximum of four UAD-2 devices (including Apollo Twin) can be used in the same computer system.
    • A maximum of one Apollo Twin can be used in the same computer system.
    • A maximum of one UAD-2 Satellite FireWire device can be used in the same computer system via the Apple Thunderbolt to FireWire Adapter.
    • To use UAD-2 QUAD/OCTO PCIe cards with Apollo Twin, a compatible Thunderbolt to PCIe chassis must be used.
    • UAD-2 SOLO PCIe and UAD-2 DUO PCIe cards are not compatible with Apollo Twin.
    • UAD-2 SOLO/Laptop is not compatible with Apollo Twin.

Apollo Audio Interface Compatibility

  • Apollo Twin software is compatible with other Apollo models (Apollo DUO, Apollo QUAD, or Apollo 16) if the other Apollo models are equipped with a Thunderbolt Option Card or Thunderbolt 2 Option Card.
  • Connecting different Apollo hardware models to the computer simultaneously is not currently compatible.
  • Console sessions are not interchangeable between different Apollo hardware models.

Device Driver and UAD Plug-In Compatibility

  • Apollo Twin has 64-bit device drivers. Apollo Twin cannot be used with 32-bit operating systems.
  • UAD Powered Plug-Ins are 32-bit and 64-bit compatible.

FireWire Device Compatibility

  • Apollo Twin uses PCIe over Thunderbolt for all audio I/O and UAD-2 processing streams. Because Apollo Twin does not use FireWire, the Apple Thunderbolt to FireWire Adapter cannot be used for Apollo Twin's Thunderbolt connection to the computer (the Mac must have a built-in Thunderbolt port to use Apollo Twin).

Thunderbolt Compatibility

  • Apollo Twin is a Thunderbolt 1 device. The device is compatible with Thunderbolt 1 and Thunderbolt 2 Macs.
  • Apollo Twin has only one Thunderbolt port. It must be connected at the end of the Thunderbolt chain.
  • Apollo Twin is officially certified as Thunderbolt compliant and is therefore compatible with other certified Thunderbolt devices when used in the same chain.
  • The Startech Thunderbolt Docking Station is tested in-house and is known to be compatible with Apollo Twin. This device has an HDMI display output which can be used for an external display if your computer has only one Thunderbolt port.
  • Apollo Twin cannot be bus powered via Thunderbolt. The included external power supply must be used.
  • Apollo Twin uses the PCIe protocol for all audio I/O and UAD-2 plug-in processing streams. Because Apollo Twin does not use FireWire, the Apple Thunderbolt to FireWire Adapter cannot be used for Apollo Twin's Thunderbolt connection to the computer.
  • For additional details about Thunderbolt operation with UAD devices, see the Thunderbolt support page.
  • Universal Audio Thunderbolt devices are tested with authentic Apple Thunderbolt Cables and Thunderbolt Optical Cables by Corning. Using off-brand cables may cause unpredictable results.

Thunderbolt and Mini DisplayPort

  • For general information about Thunderbolt ports and displays, see Apple's Thunderbolt ports and displays FAQ.
  • Apollo Twin cannot be used by connecting it to a Mini DisplayPort connector. Although Thunderbolt and Mini DisplayPort devices have the same physical connector, the underlying communication protocol used by these devices is different.
  • The type of device port can be determined by the icon next to the port. Thunderbolt ports have a "lightning bolt" icon, while Mini DisplayPort ports have a "display" icon. The difference between these ports and icons is shown in the illustration below.

Port Icons

Quick Start: Installation, Registration, & Authorization


Quick Start Overview

  • Follow the steps below to setup Apollo Twin.
  • For a short video of the setup process, click here.
  • Setup includes connecting the hardware, installing the software, and authorization to claim included UAD plug-ins.
  • For more detailed explanations, see the Apollo Twin Hardware Manual.


Hardware Setup

Connect to Computer and Power

Caution: Before powering Apollo Twin, lower the volume of the monitor speakers and remove headphones from your ears.

  1. Connect a Thunderbolt cable (sold separately) between Apollo Twin and the Mac computer.
  2. Connect the included external power supply to an AC outlet (Apollo Twin cannot be bus powered).
  3. Connect the power supply to the 12VDC input on Apollo Twin's rear panel.
    Important: Apollo Twin has a locking power supply connector to prevent accidental disconnection. When inserting, first align the two tab "wings" on the power cable's barrel connector to the notches on the power input. Then rotate the barrel clockwise to secure it to the Apollo Twin chassis.
  4. Apollo Twin Power Supply Lock

  5. Apply power to Apollo Twin using the rear panel's power switch.


Connect to Input Sources and Monitor System(s)

One typical setup is illustrated below. Note that because the Hi-Z Instrument input on the front panel uses channel 1, the microphone is connected to channel 2 so both sources can be used at the same time.

For complete details about all of Apollo Twin's connectors and controls, see the Apollo Twin Hardware Manual.


Apollo Twin Connections



Software Installation

To install the Apollo Twin software, follow these steps:

  1. Download the latest software installer which is available from this page. The installer file is downloaded to the disk location specified in the web browser's preferences. You can watch the Apollo Twin Start Video that appears after clicking the download button to help you get started.
  2. UAD Installer Icon


  3. Double-click the installer file to launch it. The installer will guide you through the process.
  4. Note: If prompted to update the Apollo Twin firmware, click "Load" then wait for confirmation that the update is complete (see below for more firmware update details).

  5. After restarting the computer, proceed to Registration & Authorization below to complete the setup process.

About Firmware Updates

  • Firmware updates for the Apollo Twin hardware may be included within the software to enhance system functionality.
  • For optimum results, always update the firmware by clicking "Load" if prompted by the software.
  • The software will guide you through the firmware update process. Be sure to follow the instructions on screen.
  • The Apollo Twin software prompts for firmware updates automatically (if available).

Important: Do not interrupt system power during any firmware update routines.


Registration & Authorization

After software installation and restart, follow the steps below. Apollo Twin must be connected and powered.

  1. Launch the UAD Meter & Control Panel
    To open the application, click its icon in the Mac OS X Dock.
  2. Launching the UAD Meter & Control Panel


  3. Open the UAD Meter's Plug-Ins Panel
    To access the panel, first click the menu button in the UAD Meter window (1), then select “Plug-Ins...” from the drop menu (2).
  4. UAD Meter Menu


  5. Click the “Authorize Plug-Ins” Button
    The button is located in the Plug-Ins panel (see #2 above).
  6. Your web browser will connect to the UA online store and our web pages will guide you through the process of process of creating an account, registering your hardware, and claiming bundled UAD Powered Plug-Ins.


    Authorize Button


  7. Download the Authorization File
    Click the blue “Download Authorizations” button on the final registration page if the file does not download automatically. The file is downloaded to the location specified in the web browser's preferences.

  9. Load the Authorization File
    Double-click the downloaded auth.uad2 file. After a few moments the Authorization Status window appears and Apollo Twin is ready for use!
  10. Authorization File

    Authorization Status


What Next?

Learn how to set gain levels for the mic, line, and instrument inputs, and output levels for the monitor speakers and headphones. Instructions are in the next section.


Setting Hardware Input & Output Levels

This section explains how to operate the panel controls so you can set input gain levels for the inputs (mic, line, and Hi-Z), and adjust volume levels for the outputs (monitors and headphones).

Refer to the top panel illustration below for the control names and numbers mentioned in this section. For detailed descriptions of all Apollo Twin controls, see the Apollo Twin Hardware Manual.

Important: Before proceeding, lower the volume of the monitor speakers and remove headphones from your ears.


Apollo Twin Top Panel

Apollo Twin's top panel


Set Input Gains

  1. Select the input channel to be adjusted by pressing the PREAMP button (9) until the Channel Selection Indicator (3) displays the desired channel (CH1 or CH2).
  2. Select the input type (mic or line) by pressing the INPUT Select button (11) until the Input Type indicator (5) displays the desired input jack* (see note below).
  3. Adjust the channel's input gain by increasing the Level knob (1) until the input meter for the channel (4) approaches maximum, but does not reach the red clip LED when the input signal is present. If the level is too high to avoid clipping (when the red “C” LED illuminates), press the PAD button (11).
  4. To set the input gain for the other input channel, repeat steps 1 – 3.

Adjust Output Volumes

  1. Select the output volume to be adjusted (monitor or headphones) by pressing the MONITOR button (10) until the Monitor Selected (6) or Headphone Selected (8) indicator is lit.
  2. Adjust the volume level by carefully increasing the Level knob (1) until the desired volume is reached (you may need to adjust the volume of the speakers).
  3. To set the other output volume (monitor or headphones), repeat steps 1 – 2.

Mute (and Unmute) Monitor Outputs

  1. Select the Monitor outputs by pressing the MONITOR button (10) until the Monitor Selected (6) indicator is lit.
  2. Press the Level knob (1) to mute the monitor outputs. The Volume Level Indicator LEDs (2) are red when the monitors are muted and Monitor is selected (6).
  3. To toggle the monitor mute state, press the Level knob (1) whenever Monitor (6) is selected.


  • *The Hi-Z input is automatically selected, overriding the channel 1 Mic and Line inputs, when a ¼” mono TS (tip-sleeve) plug is connected to the Hi-Z Instrument jack (12) on the front panel.
  • To control both channels simultaneously when a stereo source is connected, press the LINK button (11) when an input is selected (9).
  • Line outputs 3 & 4 are accessed and controlled via software only (Console or DAW).


What Next?

Refer to the Apollo Software Manual to learn how to configure the audio interface settings, use the Console application and Realtime UAD Processing for live input monitoring, use the Console Recall plug-in in a DAW, and much more.

Explore the Console

  • Launching Console
    To open the application, click its icon in the Mac OS X Dock.
  • Launching Console


  • Explore the interface
    For complete Console details, see the Apollo Software Manual.



General Usage Notes

Apollo Twin Connections

  • For optimum results, quit all audio software applications that are using Apollo Twin I/O and/or UAD plug-ins before disconnecting Apollo Twin from the computer. This includes all DAW software, Apollo Twin's Console application, and the UAD Meter & Control Panel application.

Console Application

  • (DUO only) UAD Powered Plug-Ins within Console use DSP differently than when used within a DAW. To maintain the lowest possible input latency, UAD plug-ins used on a single Console input are chained and must fit within a single DSP chip. Therefore, with an Apollo Twin DUO it is possible to get an “DSP load limit exceeded” message even though the UAD Meter may indicate there is plenty of DSP available.
  • Console session files (configuration presets) saved with Console's CONSOLE RECALL menu will not be saved if the "/" (forward slash), "\" (back slash), or "?" (question mark) characters are in the filename. Avoid these characters when saving Console files.

Sample Rate Changes

  • For optimum results when using Console without a DAW, perform sample rate changes in the Console Settings window within the Console application (instead of within Mac OS X's Audio MIDI Setup application).
  • For optimum results when using a DAW, perform sample rate changes within the DAW itself (instead of the Console Settings window within the Console application or within Mac OS X's Audio MIDI Setup application).
  • For optimum results when Apollo Twin's current sample rate is different from the sample rate set within a DAW session, change Apollo Twin's sample rate in the Console Settings window to match the sample rate of the DAW session before loading the DAW session.

UAD Resource Usage

  • Apollo Twin uses DSP and memory for its internal DSP mixer. Therefore, the UAD Meter & Control Panel application will show some DSP and memory usage even when UAD plug-ins are not in use.

UAD Presets

  • When logged into the computer under an account that does not have administrator privileges, saving UAD preset files via the UAD Toolbar will result in an "Unable to save preset file" dialog. If this occurs, either log in with an administrator account, or use the DAW's preset management tools.

What is the lowest hardware buffer setting I can use with Apollo Twin for stable operation?

The audio interface hardware I/O portion of Apollo Twin can run at any hardware buffer setting that is stable within the DAW itself. Results may vary as a result of how much the DAW session stresses the computer system. This can be influenced by:

  • Session track count and sample rate
  • How many processor-intensive native plug-ins (such as virtual instruments, convolution reverbs, etc.) are in the session
  • Processor type, speed, and overall power of the computer

Of course, for the lowest possible latency when monitoring live inputs, we recommend using the included Console application to take advantage of Apollo Twin’s unique Realtime UAD Processing feature, where DAW I/O buffering does not apply at all.

System Sleep

System sleep is supported with Apollo Twin. However, disabling sleep when using DAW software is generally recommended. For optimum results when using Apollo Twin with DAW software, follow these guidelines:

  • Disable sleep. Open the System Preferences*>Energy Saver panel and drag the “Computer Sleep” slider to “Never” (far right position).
  • Before sleeping the system, quit any DAW software using UAD plug-ins.

*System Preferences.app is located in Applications/Utilities, or click the Apple icon in the menu bar (upper left of screen) and select “System Preferences” from the menu.

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