Hi Toleda,
With a DX58SO and latest cloverALC as of today, and ALC889, all analog audio outputs work. The issue is the onboard optical S/PDIF out. The red light is always on, but no matter whether or not Built-In Digital Output is selected, the red light stays on and emits no data. I am using a receiver with optical in, and it plays nothing. The red light turns on whenever in the boot process it is that AppleHDA loads. Evidently something is working, but something else is not working.
This is my DX58SO build as should be correctly posted on my profile and signature. macOS is 10.13.2, with E5645 @ 3.07Ghz, and a Sapphire HD 5570 (HDMI/DP audio not working, but not interested in getting to work, have no need.) I am single booting macOS. I have no other OS installed, so no Windows 10 present to mess everything up or mess with the audio registers. macOS is it. Cold boot or not, same thing.
At least my setup is stable, but the optical audio does not work. I should have attached all files as stated, if something's off, let me know and I'll gladly fix it.
Thank you for all your hard work. Without you none of my sound would work at all.
-Newhacker