
You may need to power-cycle the interface once after the driver is installed. Product Repairs Click here to arrange repairs and check repair status for your PreSonus gear. Mac OS Gatekeeper may ask for permission to run the new Firewire driver if you have SIP enabled, if prompted, Visit System Preferences->Security & Privacy to allow the driver to run. Answers Ask and answer questions with PreSonus users just like you Downloads Software and driver updates, tutorials, manuals and more Product Registration Ready to register your PreSonus product Simply create or log into your My.PreSonus account. To uninstall, run the PreSonus uninstaller from the new dmg:

Can you think any other reason? Thank you.If you find my work useful, please feel free to buy me some coffees at Run unsupported PreSonus FireStudio* on Mac OS Catalina 10.15 and Big Sur 11.1 (Intel Only) THIS WILL NEVER WORK ON APPLE SILICON (M1) MACS NO SUPPORT WHATSOEVER IS PROVIDED FOR THIS! IF IT EATS YOUR FIRSTBORN, THEN IT IS ON YOU.

What else can be wrong to prevent driver from working- it is ASIO driver- the audio does not even play with Windows Media Player and YouTube if Presonus selected for output. I am sure they will blame it on my build, hardware incompatibilities, wrong drivers, Windows issues and so on. And I did not hear all day from them yesterday. The tech support sent me article about drivers signing and at the end of article, it says, "Sorry for inconvenience". I can not install Windows 8 as it is not supported by Kaby Lake processor. Or should I say- the card is working, I hear "tam tam tam" sound when I connect and disconnect the mixer and the mixer becomes available under devices, so the card is working, but not the whole thing. My old FW card from my old computer (the same model as new card) that works good in old computer also does not work in new computer. So I took out the Fire Wire card, tested it n my old computer- the Fire Wire card works just as expected. I completely uninstalled the Universal Control and the driver and actually uninstalled the device in Device Manager, then disabled Drivers signing check as discussed above and reinstalled.

Hopefully a reinstall will work if not since you already have secure boot disabled try "bcdedit /set testsigning on" from an Administrator command prompt than reboot If that doesn't do it contact their support again because that is an expensive device and they should support it with an update otherwise you will have to go back to Windows 8 until they do which would really suck.
