User Manual
Symphony I/O Mk II Software 
System Requirements 
Symphony I/O Mk II Thunderbolt 
Thunderbolt port-equipped Apple Mac, 4GB memory required, 8GB recommended 
Mac OS X Mavericks 10.9.5 or greater 
Download and Install Software 
Before using your Symphony I/O, you must download the latest Symphony I/O Mk II Software Installer from 
Apogee’s website here: www.apogeedigital.com/support/symphony-io-mk-ii 
The download comes in the form of a .dmg image file. Open it to view the 
contents.  
Inside you will find these items: 
•
Symphony I/O MkII Thunderbolt Release Notes 
•
Symphony IO MkII System Software Installer.pkg 
•
Symphony IO MkII Uninstaller 
Double-click to launch the Symphony IO MkII System Software Installer.pkg 
A dialog box will appear with a series of steps 
Follow the prompts to complete the installation 
Once complete you will be required to restart your 
computer
! !
As a result of the software install: 
•
Apogee Maestro controller software is placed in the Mac’s Applications folder 
•
When connected, Symphony Thunderbolt appears as an audio input/output device in Mac Sound System 
Preferences 
•
Symphony Thunderbolt Firmware Updater.app is placed in the Mac’s Utilities folder!
SYMPHONY I/O MK II - USER’S GUIDE Page 9










