Overview
In 10.11, Apple has completely rewritten the USB drivers. The new drivers appear to employ the use of ACPI to a much greater extent than the previous drivers. This puts more pressure on ACPI (DSDT) to be correct. If it is not correct, ports that exist may not be enabled by the new drivers.
In fact, even Apple's own products were found to be incorrect, so Apple created a way to override DSDT with a port injector. In the event properties are injected to define the...
[Guide] 10.11+ USB changes and solutions
In 10.11, Apple has completely rewritten the USB drivers. The new drivers appear to employ the use of ACPI to a much greater extent than the previous drivers. This puts more pressure on ACPI (DSDT) to be correct. If it is not correct, ports that exist may not be enabled by the new drivers.
In fact, even Apple's own products were found to be incorrect, so Apple created a way to override DSDT with a port injector. In the event properties are injected to define the...
[Guide] 10.11+ USB changes and solutions