- May 3, 2012
- Intel DH67BL
- HD 3000
- Mobile Phone
Here is IOREG w/drive connected and showing connected to usb 2.0 bus in system report.
Not all ports on the 4540s are USB3. Maybe you have it plugged into a USB2 port. Try a different port.
Post ioreg after you have plugged into each port (have IORegistryExplorer running while plugging/ejecting/unplugging). The former connections will be shown in red, so I can see the configuration of each port.
Could be also a BIOS setting/BIOS version issue.
You should also try other USB3 devices...