Signed Version for Yosemite/Mavericks
Pre-releaseBeta version of a signed, 128-channel version of Soundflower.
(as required by Apple, this version of Soundflower.kext will be
installed in the /Library/Extensions folder,
not in /System/Library/Extensions as previous versions were).
FIRST try the downloading the Soundflower-2.0b1.dmg installer.
After downloading, control-click on Soundflower.pkg and select "open"
(then click "Open" in the "unidentified developer" alert window)
IF THE INSTALLER FAILS
look in System Preferences:Sound and see if the old Soundflower devices are still loaded.
if so, open a terminal and type:
sudo kextunload /System/Library/Extensions/Soundflower.kext
sudo rm /System/Library/Extensions/Soundflower.kext
confirm the old Soundflower devices are unloaded,
then try running the .pkg installer again
AND IF YOU ARE STILL HAVING TROUBLE
you can try installing manually:
Download the Soundflower.kext.zip file.
Assuming it is automatically unzipped in side your Downloads folder,
Open a terminal and type:
sudo mv ~/Downloads/Soundflower.kext /Library/Extensions
sudo chown -R root:wheel /Library/Extensions/Soundflower.kext
sudo kextload /Library/Extensions/Soundflower.kext
if that all works then you can remove the old version:
sudo rm /System/Library/Extensions/Soundflower.kext