Hi I've recently purchased a HDSPe AES card and installed into a 2012 Apple Mac Pro 12 core machine. I'm only using the main PCIe card not the daughter card as I didn't have enough PCIe slot room available to have both. I updated the firmware on the card to 4.09 and I've installed the 2.27 Mac drivers and the card is being recognised and I can use it in my DAW however when the system boots, the HDSPe Settings app boots up fine but TotalMix just bounces in the dock for quite a while and then stays in the dock unresponsive and won't open. When I control click on it I only see 'Application Not Responding' and a 'Force Quit' option.

Now I've tried repairing permissions and re-installing the driver software again but I notice something. Every time I try to install the Driver software I'm getting this error message after it's completed the installation and asks me to reboot

"The system extension “/System/Library/Extensions/SoundflowerSigned.kext” was installed improperly and cannot be used. Please try reinstalling it, or contact the product’s vendor for an update."

Does the RME driver software install this 'SoundflowerSigned.kext'? If so why is it failing to install properly and is this the reason TotalMix won't work?