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: March 3, 2015

Jump to:
Latest News & Updates Support Videos General Info
Known Issues About UAD v8 Software System Requirements
Device Compatibility Quick Start Setting I/O Levels
General Usage Notes    

Latest Technical News

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

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 and UAD operation manuals are at this location on the hard drive:

  • Macintosh HD/Applications/Universal Audio
  • All operation manuals can be accessed from the Help menu within the Console application, or by clicking the View Documentation button in the Help panel within the UAD Meter & Control Panel application.
  • All operation manuals can also be downloaded here.

Additional Information


Known Issues (Current Release)

Known issues in UAD v8.0.1

  • The initial release of UAD v8 software (UAD v8.0.1) has the known issues listed in this section.
  • Known v8.0.1 issues in this section will be improved in a future release.
  • Important: The information in this section applies specifically to the current v8.0.1 release and supersedes related information on this page.

System sleep and Thunderbolt device hot-plugging are incompatible with this release

  • UAD v8.0.1 is incompatible with system sleep and connecting/disconnecting Thunderbolt devices when the computer is on. This will be improved in a future release.
  • Required: Connect and power on all Thunderbolt devices BEFORE powering on (starting) the computer. Disconnect and power off all Thunderbolt devices AFTER shutting down (powering off) the computer.
  • To disable system sleep, open the Energy Saver panel within System Preferences and drag the “Computer Sleep” slider to “Never” (far right position).
  • Note: If Apollo is disconnected while the computer is on, system sound may no longer be heard. This will be improved in a future release. System sound can be re-enabled by option-clicking the Speaker icon in the Mac OS X Menu Bar (at upper-right of screen) and selecting an output other than Apollo from the "Output Device" list.

Apollo Expanded firmware updates require complete system power down

  • This release includes firmware updates. After updating the firmware, the computer and all UAD devices must be fully powered down.
  • Important: After clicking "Load" to initiate the firmware update(s):
    1. Wait for the "Power Down System" dialog
    2. Shut down the computer (power OFF)
    3. Power OFF all UA devices
    4. Power ON all UA devices
    5. Start the computer
    After the above steps are complete, the system is ready for use.


About UAD v8 software

New UAD v8 Features

In addition to new UAD plug-ins, UAD v8 software offers significant enhancements for the UAD Thunderbolt platform, including:

  • Apollo Expanded, featuring:
    • Mix-and-match compatibility with up to four Apollo interfaces
    • New Console 2.0 application with over 25 new user-requested features
    • Flex Driver enables custom I/O routes and names at the Core Audio driver level
  • Compatibility with up to six UA devices
  • Simplified UAD authorization (Internet connection required)
  • Apollo Unison technology for new Distortion Essentials Pedals
  • Mac OS X Yosemite compatibility

Simplified UAD Authorization

  • As of UAD v8 software, UAD authorization is automatic (Internet connection required). When the UAD software is updated, authorization happens in the background when the computer is started and/or when the UAD Meter & Control Panel application is opened.
  • It is no longer necessary to manually authorize after updating UAD software; you can begin working immediately.
  • After purchasing a UAD plug-in, the UAD software requires manual authorization. The web store guides you through the process.


Apollo Twin System Requirements

    Thunderbolt Systems

    • Apple Mac computer with available Thunderbolt or Thunderbolt 2 port
    • Mac OS X 10.8.5 Mountain Lion, 10.9.x Mavericks, or 10.10.x Yosemite
    • 4 gigabytes available disk space
    • Internet connection to download software and authorize UAD plug-ins
    • Compatible VST, Audio Units, RTAS, or AAX 64 plug-in host DAW software
    • Thunderbolt cable (sold separately)


  • For information about Apple Mac Pro (Late 2013) compatibility, click here.
  • Computer resources required by modern DAWs (especially with high track counts) can tax the computer significantly. For optimum performance when using a DAW, the computer hardware options listed below are recommended:
    • Quad-core i5 or better processor
    • 8 GB or more RAM


Device Compatibility

Thunderbolt Computer Compatibility

  • Apollo is compatible with all Apple Mac computers that have an available Thunderbolt or
    Thunderbolt 2 port. The computer must meet the system requirements.
  • UAD Thunderbolt Software is not compatible with Windows PC computers. Apollo FireWire software can be used for
    PC-equipped studios. For details, click here.

UA Device Compatibility with UAD v8 Thunderbolt Software

  • A total of six UA devices can be used together
  • Up to four Apollo interfaces of any type* can be used together (mix-and-match)
    *Exception: One Apollo Twin can be used
  • To use UAD-2 PCIe cards, a compatible Thunderbolt-to-PCIe chassis is required
    Note: UAD-2 SOLO PCIe and UAD-2 DUO PCIe cards are incompatible with Apollo Twin
  • Up to two UAD-2 Satellite FireWire units are compatible
    Note: All compatibility information for this device still apply when using UAD Thunderbolt Software
  • All Apollo units must be connected via Thunderbolt
  • Apollo FireWire connections are incompatible

FireWire Device Compatibility with UAD v8 Thunderbolt Software

  • FireWire devices such as external hard drives are compatible
  • FireWire devices may be connected directly to the computer's FireWire port (if available) or an available Thunderbolt or Thunderbolt 2 port via the Apple Thunderbolt to FireWire Adapter

Device Driver and UAD Plug-In Compatibility

  • Apollo Twin requires Mac OS X version 10.8.5 and higher (the lowest OS version that supports Thunderbolt 2)
  • UAD Powered Plug-Ins are 32-bit and 64-bit compatible
  • Console 2.0 is a Retina-compatible 64-bit application


Thunderbolt Connections

Connecting Apollo Twin to the computer

  • Connect Apollo Twin to any available Thunderbolt port on the Thunderbolt bus (either directly to the computer's Thunderbolt port, or to an available Thunderbolt port on a Thunderbolt peripheral attached to the computer's Thunderbolt port) with a Thunderbolt cable (sold separately).
  • Thunderbolt 1 or Thunderbolt 2 ports and devices may be mixed and/or matched for any/all Thunderbolt connections.
    Note: All Thunderbolt devices must be connected to the same Thunderbolt port on the computer.
  • Apollo Twin cannot be bus powered via Thunderbolt. The included external power supply must be used.
  • See the Apollo Thunderbolt support page for specific instructions on how to connect and use two or more Apollo units together.
  • 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.
  • Universal Audio Thunderbolt devices are officially certified as Thunderbolt compliant and are 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 UA Thunderbolt devices. This device has an HDMI display output which can be used for an external display to free the Thunderbolt port for Apollo Twin.
  • All Thunderbolt devices must be connected to the same Thunderbolt port on the computer.
  • The Thunderbolt protocol supports a maximum of six Thunderbolt peripherals per Thunderbolt bus.

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 registration to authorize bundled UAD plug-ins.
  • For more detailed explanations (and offline authorization procedures), see the UAD System Manual.


Hardware Setup

Connect to Computer and Power

Note: 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 Setup

To install the Apollo Twin software, follow these steps:

  1. Download the latest UAD Powered Plug-Ins software installer. 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. Double-click the downloaded installer file to open it. The installer guides you through the process. Be sure to restart the computer when prompted.
  3. After restarting the computer and Apollo Twin is detected, the default web browser will open. Follow the instructions on the web pages to create an account, register the hardware, and claim bundled UAD plug-ins.

Setup Notes:

  • After registration is complete, Apollo Twin is automatically authorized.
  • If the hardware was already registered, when the computer restarts the UAD Meter & Control Panel application automatically opens and UAD plug-ins are authorized in the background.
  • If a new UAD device is subsequently added to the computer, the web browser opens again to register the new device.
  • 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).

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 onscreen instructions.
  • The Apollo Twin software prompts for firmware updates automatically (if available).
  • For complete firmware update information, see the firmware support page.

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


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.

Exploring Console

  • Opening 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.

Console 2


General Usage Notes

Console Application

  • (Apollo Twin DUO only) Realtime UAD Processing with UAD plug-ins in Console uses DSP differently than when UAD plug-ins are used within a DAW. To maintain the lowest possible input latency, UAD plug-ins used on a single Console input are “chained” and must be processed within a single DSP chip. Therefore, it is possible to get a DSP/PGM/MEM limit exceeded message even though the UAD gauges may indicate there is plenty of DSP/PGM/MEM available.
  • Session, plug-in, and I/O preset files saved within Console will not be saved if the "/" (forward slash), "\" (back slash), or "?" (question mark) characters are in the filename. Avoid these and other special characters when saving Console presets of any type.

Sample Rate Changes

  • For optimum results when using Console without a DAW, perform sample rate changes 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 application or within Mac OS X's Audio MIDI Setup application).
  • For optimum results when Apollo's current sample rate is different from the sample rate set within a DAW session, change Apollo's sample rate within Console 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

  • Important: System sleep is incompatible with UAD v8.0.1 (current release). See the known issues section for details.
  • Disable sleep. Open the Energy Saver panel within System Preferences* and drag the “Computer Sleep” slider (if present) to “Never” (the far right position).
  • To access System Preferences, press the Apple icon in the OS X Menu Bar (upper left of screen) then select the application from the drop menu.

Sleep Disabled

Computer sleep is disabled in the Energy Saver panel within the System Preferences application

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