Enables audio outputs on OSX for CM6206 Audio Card. By default, although it is fully USB audio compliant, outputs are not enabled and there is no sound
Fixes
- works on x64 platforms
- works with Catalina 10.15.6
Initial code:
- https://www.dr-lex.be/software/cm6206.html
- by Alexander Thomas (aka Dr. Lex)
kIOReturnExclusiveAccess case kIOReturnExclusiveAccess: sprintf(out_buf,"kIOReturnExclusiveAccess - exclusive access and device already open"); break;
Succeeded! Here they say, it doesn't matter if it happens :)
else if (ret == kIOReturnExclusiveAccess)
{
// this is not a problem as we can still do some things
}https://github.com/luisliz/CM6206-Catalina
MOZGIII / cm6206-mac-codeless-kext
- https://github.com/MOZGIII/cm6206-mac-codeless-kext
- Codeless Kext for CM6206 USB Sound Card to prevent the Apple drivers from hijacking a device
- /System/Library/Extensions/
- became readonly
- From within the recovery mode might be possible
- Kexts are deprecated
- became readonly
Cheap Multichannel Audio on OS X
- “7.1 channel USB soundcards” based on the C-Media CM6206 chipset
- https://www.cmedia.com.tw/products
How to replace the missing optical-digital audio output on newer Macs
Technical Q&A QA1370 - Common QA and Roadmap for USB Software Development on Mac OS X
Technical Q&A QA1075 - Making sense of IOKit error codes
USBInterfaceOpen always report kIOReturnExclusiveAccess error
Apple deprecating macOS kernel extensions (KEXTs) is a great win for security
How to delete kexts in Catalina?
“Read-only file system” when I try to touch in Mac OS Catalina
- Apple kernel extension APIs to be deprecated in macOS 10.15.4.
How to Add and Remove Kexts from macOS
MultiBeast 12.3.0 - Catalina 12.3.0
- MultiBeast, the ultimate post-installation utility, has been updated to version 12.3.0 for macOS Catalina 10.15.5+.
https://www.mail-archive.com/[email protected]/msg25003.html https://www.mail-archive.com/[email protected]/msg25017.html Linux Kernel & Device Driver Programming