He or she did so in such a way that even Apple's own computers were NOT compatible with its USB drivers. So some Apple programmer rewrote the USB drivers. Instead of correcting the DSDT, a port injector can be used (just as Apple did for their own computers).
USB 2.0 HUB FOR MAC DRIVERS
The drivers use ACPI to obtain information about which ports are active. In 10.11+ Apple has changed significantly the way the USB drivers work. In the event properties are injected to define the available ports, these properties are used instead of ACPI. In fact, even Apple's own products were found to be incorrect, so Apple created a way to override DSDT with a port injector. If it is not correct, ports that exist may not be enabled by the new drivers. This puts more pressure on ACPI (DSDT) to be correct. The new drivers appear to employ the use of ACPI to a much greater extent than the previous drivers. In 10.11, Apple has completely rewritten the USB drivers. Certainly the monitors of this forum don't know at all and cannot help. They do very technical and in depth analysis of OS X that no one outside of Apple will reveal to you. I found technical analysis of the bug in Hackintosh forums. I discovered that this is a USB driver bug.
Yet they worked perfectly well in OS X 10.10 Yosemite. They are recognized by the Mac as only USB 2.0 Hubs. They don't work with USB 3.0 devices that are USB 2.0 compatible. The hubs will only work with purely USB 2.0 devices.
Since my MacBook Pro 15 Retina has only 2 USB 3.0 ports, this is a serious limitation.jĪ serious problem: USB 3.0 Drives attached to USB 3.0 HUBS are not recognized. However, one serious bug that is a show stopper remains: USB 3.0 HUBS do not work in OS X 10.11. I finally was forced to upgrade this past weekend after several app developers decided to only support OS X 10.11 for their apps. I held off on upgrading my MacBook Pro 15 Retina to OS X 10.11 El Capitan because it is my work computer.
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