- Joined
- Jan 3, 2020
- Messages
- 9
- Motherboard
- ASUS Prime B560-Plus
- CPU
- i5-11400
- Graphics
- RX 580
- Mac
- Mobile Phone
I'm currently running macOS Catalina 10.15.3, recently updated from 10.15.2, which also had the issue I will describe below.
With my monitor connected to an XFX AMD Radeon RX 580 GTS XXX Edition 8GB via HDMI or DP, I'm encountering audible artifacts (crackling) and dropouts using a USB audio interface (UMC1820). These issues generally become apparent when opening applications, focusing windows, etc. and will remain, until there is eventually no audio output and the computer or USB device are restarted.
I did not encounter this issue prior to installing the XFX AMD Radeon RX 580 GTS XXX Edition 8GB, previously used an EVGA NVIDIA GT640 2GB in the same setup. NOTE: I only used DVI output with the GT640, as it uses mini-HDMI, which I never had access to.
I do not encounter these issues when using the same USB audio interface on my MacBook Pro running Catalina 10.15.2, nor do I encounter these issues on Windows 10, installed on a secondary SSD, in the same build.
I've gone through countless online threads, testing other users confirmed solutions and suggestions for similar problems. Here is a list of things that I tested and made note of:
With my monitor connected to an XFX AMD Radeon RX 580 GTS XXX Edition 8GB via HDMI or DP, I'm encountering audible artifacts (crackling) and dropouts using a USB audio interface (UMC1820). These issues generally become apparent when opening applications, focusing windows, etc. and will remain, until there is eventually no audio output and the computer or USB device are restarted.
I did not encounter this issue prior to installing the XFX AMD Radeon RX 580 GTS XXX Edition 8GB, previously used an EVGA NVIDIA GT640 2GB in the same setup. NOTE: I only used DVI output with the GT640, as it uses mini-HDMI, which I never had access to.
I do not encounter these issues when using the same USB audio interface on my MacBook Pro running Catalina 10.15.2, nor do I encounter these issues on Windows 10, installed on a secondary SSD, in the same build.
I've gone through countless online threads, testing other users confirmed solutions and suggestions for similar problems. Here is a list of things that I tested and made note of:
- Install “AHCIPortInjector.kext”.
- Configure “Busratio=40” in boot args, set CPU (4000) and Bus Speed (100000) in config.plist. This is specific to my hardware.
- Tested USB 2.0 and USB 3.0 ports.
- Disable SIP and cleared NVRAM.
- Disabled power saving features in UEFI (Speedstep, C States, etc.)
- Tested using the USB device in an aggregate device. (Audio MIDI Setup)
- Tested various input and output sample rates. (Audio MIDI Setup)
- RX 580 is in PCIE1, the only x16 lane on the H97m Pro4.
- Replaced “AppleUSBAudio.kext” in S/L/E with earlier version from macOS 10.12.2. I recovered the original file after confirming this didn't work.
- Test different System Definitions: iMac 14,2 (Default), iMac 14,1, iMac 15,1.
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