Hi, Toleda.
1. No audio output.
There are however audio output devices (line out, optical out and int.speakers) in System preferences.
(Mobo doen't have optical out, just 3 ports)
2. OSX 10.11.4, UEFI, Clover 2.3k r3423
Mobo MSI H170i Pro AC (ALC887), AMI BIOS 2.5 (latest)
Core i5-6500, Intel...