How do I record my Mac's audio with Iris? dominic May 13, 2021 21:57 Updated Follow In order to record your Mac's audio Iris requires that you install the Sound Siphon plugin. DOWNLOAD SOUND SIPHON PLUGIN On macOS Big Sur set your Mac's default output to "Sound Siphon Output". Related articles Why can’t I select an audio input? How do I prevent audio inputs from mixing? Sound Siphon 2.1.1 Release Notes and Download When should I use Encode Later? How do I remove the Iris watermarks from recordings? Comments 0 comments Article is closed for comments.