If the problem was not hearing sound in other apps after changing the system output device to Soundflower, the answer is to run Soundflowerbed, or use Sound Siphon, which avoids running a second application to hear sound. See Recording System Audio WITHOUT Soundflower - #3 by Gale_Andrews
To uninstall Soundflower properly, use the uninstaller script. See How to uninstall Soundflower? - MaxMSP Forum | Cycling '74.
Gale