(copy the kexts to the folder of your choice, most of the time I simply rename them *.kext to *.bak) I'll keep on testing but I have other hardware problems, and have to find time to fix this.Īlways do backups of the system files you replace. Don't do this on your main system, unless you know exactly what you're doing. WARNING: this is 'work in progress', this workaround requires system files modification.

To answer the request of a few users who pm'ed me for detailed information : Or if you encounter problems, a complete USB stack reversing to Yosemite's at post 24

See updated workaround at post 10 + 61 (only for Midi ports)