---
title: Symphony I/O (mk1) User's Guide, Documentation, and Downloads
description: "Symphony64 comes in two forms: PCIe and Thunderbridge. It supports up to 64 channels In/Out up to 192kHz sample rate. These documents and Installers are for using Symphony64 with Legacy Products equipped with the X-Symphony option card; such as AD-16x, DA-16x, Rosetta 200, or Rosetta 800."
---

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# Symphony I/O (mk1) User's Guide, Documentation, and Downloads

## These documents are for using Symphony64 with Legacy Products equipped with the X-Symphony option card; such as AD-16x, DA-16x, Rosetta 200, or Rosetta 800

![Screen Shot 2024-10-23 at 7-03-05 PM-png](https://knowledge.apogeedigital.com/hs-fs/hubfs/Screen%20Shot%202024-10-23%20at%207-03-05%20PM-png.png?width=670&height=179&name=Screen%20Shot%202024-10-23%20at%207-03-05%20PM-png.png)

### User's Guide

- [Symphony I/O User's Guide](https://knowledge.apogeedigital.com/hubfs/Users%20Guides%20and%20Documentation%20PDFs/Symphony%20IO%20-%20mk1/Symphony-IO-users-guide-july-2018.pdf?hsLang=en)<https://knowledge.apogeedigital.com/hubfs/Users%20Guides%20and%20Documentation%20PDFs/ThunderBridge-Quickstart-Guide_Web.pdf?hsLang=en>

### Downloads

- [Symphony System Release v5.5 (final release)](https://knowledge.apogeedigital.com/hubfs/Software%20Installers/Symphony%20IO/SymphonyIO_Release_5.5.dmg?hsLang=en)  
  macOS 11 Big Sur through macOS 14 Sonoma\*  
  \- Maestro 2.11  
  NOT SUPPORTED on macOS 15 or higher because:  
  \**Audio in/out functional on macOS 15 Sequoia and macOS Tahoe 26. But Maestro 2 software does not work. Adjust settings using front panel controls of your Apogee device instead.*  
  \*\*Symphony I/O - USB mode not working on macOS Tahoe 26.
- [Symphony System Release v5.4c](https://knowledge.apogeedigital.com/hubfs/Software%20Installers/Symphony%20IO/SymphonyIO_Release_5.4c.dmg?hsLang=en)  
  macOS 10.9 to 10.15  
  \- Maestro 2.10.9
- [Symphony System Release v4.8](https://knowledge.apogeedigital.com/hubfs/Software%20Installers/Symphony%20IO/SymphonyIO_Release_4.8.dmg?hsLang=en)  
  OS X 10.6.8 to 10.9  
  \- Maestro 2.7.11
- [Symphony System Release v4.4](https://knowledge.apogeedigital.com/hubfs/Software%20Installers/Symphony%20IO/SymphonyIO_Release_4.4.dmg?hsLang=en)  
  OS X 10.6.8 - 10.8.2  
  Maestro 2.6.22  
  \*Last Release to support Symphony Mobile card.   
  \-[Symphony IO Release 4.4 Notes](https://knowledge.apogeedigital.com/hubfs/Users%20Guides%20and%20Documentation%20PDFs/Symphony%20IO%20-%20mk1/Symphony-IO-Release-4.4-Notes.pdf?hsLang=en)  
  \-[Legacy Interfaces Release Notes](https://knowledge.apogeedigital.com/hubfs/Users%20Guides%20and%20Documentation%20PDFs/Symphony%20IO%20-%20mk1/Legacy-Interfaces-Release-4.4-Notes.pdf?hsLang=en)
- [Symphony System Release v4.2](https://knowledge.apogeedigital.com/hubfs/Software%20Installers/Symphony%20IO/SymphonyIO_Release_4.2.dmg?hsLang=en)  
  OS X 10.6.4 or above  
  \- Maestro 2.5.50

- [BOOM](https://knowledge.apogeedigital.com/boom?hsLang=en#main-content)

    - [User Guide](https://knowledge.apogeedigital.com/boom?hsLang=en#user-guide)
    - [Getting Started](https://knowledge.apogeedigital.com/boom?hsLang=en#getting-started)
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    - [Getting Started](https://knowledge.apogeedigital.com/symphony-desktop?hsLang=en#getting-started)
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    - [User Guide](https://knowledge.apogeedigital.com/symphony-i-o-mk-2?hsLang=en#user-guide)
    - [Getting Started](https://knowledge.apogeedigital.com/symphony-i-o-mk-2?hsLang=en#getting-started)
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    - [Rosetta 200](https://knowledge.apogeedigital.com/legacy-products?hsLang=en#rosetta-200)
    - [Rosetta 800](https://knowledge.apogeedigital.com/legacy-products?hsLang=en#rosetta-800)
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    - [Sennheiser ClipMic](https://knowledge.apogeedigital.com/legacy-products?hsLang=en#sennheiser-clipmic)
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    - [Symphony 64 PCIe & Thunderbridge](https://knowledge.apogeedigital.com/legacy-products?hsLang=en#symphony-64-pcie-thunderbridge)
    - [Symphony I/O Mk 1](https://knowledge.apogeedigital.com/legacy-products?hsLang=en#symphony-i-o-mk-1)
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