If you see a warning on OS X 10.7.5 or later that Soundflower cannot be opened due to your Security Preferences, right-click or control-click over the PKG file and choose 'Open', then choose 'Open' again. In the DMG itself, double-click the PKG file. To install the downloaded DMG file, double-click it to mount it.Unzip the 'Soundflowerbed.app' from the download, then place it anywhere that is convenient. If you do not have Soundflowerbed.app: the easiest solution is to download it by clicking this link.

Reboot the computer then run the '' installer as above.

You should see 'Done!' in the results, indicating that the uninstallation completed satisfactorily. In the window that opens, press the 'Run' button.

In the same 'Soundflower' folder, double-click 'Uninstall Soundflower.scpt' to uninstall Soundflower 1.6.x.

Copy Soundflowerbed.app from the /Applications/Soundflower/ folder to your Desktop or somewhere else.

Fortunately Soundflowerbed from Soundflower 1.6.6b can be used on its own with Soundflower 2.0b2. It can also be used on Mavericks or Yosemite but it lacks the 'Soundflowerbed' application that lets you hear audio on your computer while Soundflower is set as the system output device. Important: The 2.0b2 version is the only version that will work on El Capitan and later. Obtaining Soundflowerbed if you install Soundflower 2.0b2

OS X 10.6 to 10.8 (Snow Leopard/Lion/Mountain Lion): Soundflower-1.6.6b.dmg from (if you are running NoScript you must disable it on that page).

OS X 10.9 (Mavericks) and later including macOS Sierra and High Sierra: from.

Set Soundflower as your system output device, then in Audacity, set Soundflower as your recording device. Soundflower is a free open source system add-on for Mac computers that allows you to route what is playing on the computer digitally back to the input without using a cable.

How to record mac sound output