1 Reply Latest reply: Sep 2, 2010 8:55 AM by Scott Billings
Thew2 Level 1 Level 1 (0 points)
I recently plugged my iPod into my 13" MBP, and got a warning that I was connecting to a slow USB connection, and I should plug it into a high speed port. Transfer speeds are extremely slow. I tried both USB ports with the same result. I have not had this issue in the past.

System profiler does not indicate the ports are high-speed:

USB Bus:

Host Controller Location: Built-in USB
Host Controller Driver: AppleUSBOHCI
PCI Device ID: 0x0aa5
PCI Revision ID: 0x00b1
PCI Vendor ID: 0x10de
Bus Number: 0x04

Apple Internal Keyboard / Trackpad:

Product ID: 0x0236
Vendor ID: 0x05ac (Apple Inc.)
Version: 0.81
Speed: Up to 12 Mb/sec
Manufacturer: Apple Inc.
Location ID: 0x04600000
Current Available (mA): 500
Current Required (mA): 40

IR Receiver:

Product ID: 0x8242
Vendor ID: 0x05ac (Apple Inc.)
Version: 0.16
Speed: Up to 1.5 Mb/sec
Manufacturer: Apple Computer, Inc.
Location ID: 0x04500000
Current Available (mA): 500
Current Required (mA): 100

USB Bus:

Host Controller Location: Built-in USB
Host Controller Driver: AppleUSBOHCI
PCI Device ID: 0x0aa7
PCI Revision ID: 0x00b1
PCI Vendor ID: 0x10de
Bus Number: 0x06

BRCM2046 Hub:

Product ID: 0x4500
Vendor ID: 0x0a5c (Broadcom Corp.)
Version: 1.00
Speed: Up to 12 Mb/sec
Manufacturer: Apple Inc.
Location ID: 0x06100000
Current Available (mA): 500
Current Required (mA): 0

Bluetooth USB Host Controller:

Product ID: 0x8213
Vendor ID: 0x05ac (Apple Inc.)
Version: 1.80
Serial Number: 002608CCAEC1
Speed: Up to 12 Mb/sec
Manufacturer: Apple Inc.
Location ID: 0x06110000
Current Available (mA): 500
Current Required (mA): 0

USB High-Speed Bus:

Host Controller Location: Built-in USB
Host Controller Driver: AppleUSBEHCI
PCI Device ID: 0x0aa9
PCI Revision ID: 0x00b1
PCI Vendor ID: 0x10de
Bus Number: 0x26

Internal Memory Card Reader:

Product ID: 0x8403
Vendor ID: 0x05ac (Apple Inc.)
Version: 98.33
Serial Number: 000000009833
Speed: Up to 480 Mb/sec
Manufacturer: Apple
Location ID: 0x26500000
Current Available (mA): 500
Current Required (mA): 500

USB High-Speed Bus:

Host Controller Location: Built-in USB
Host Controller Driver: AppleUSBEHCI
PCI Device ID: 0x0aa6
PCI Revision ID: 0x00b1
PCI Vendor ID: 0x10de
Bus Number: 0x24

Built-in iSight:

Product ID: 0x8507
Vendor ID: 0x05ac (Apple Inc.)
Version: 4.19
Serial Number: 8J9852G156UN3A00
Speed: Up to 480 Mb/sec
Manufacturer: Apple Inc.
Location ID: 0x24400000
Current Available (mA): 500
Current Required (mA): 500



I had no reason to look at profiler before, so I can't say if it described them as high-speed or not, but transfer speeds were good. Any ideas?

13" MBP, Mac OS X (10.6.4)
  • Scott Billings Level 4 Level 4 (1,655 points)
    This is where the rather poor design of USB ports comes to bite people most often. Every time they make a new "faster" USB, they do it by just adding additional pins that are recessed deeper into the plug. Shorter pins will get bent easier and it's harder to get a solid connection consistently because there's not as much metal to connect to.

    There's nothing you can do here except take it in for a logic board replacement if it's under warranty. Otherwise you'll just have to live with it. Blame the IEEE USB committee for this one. Originally USB was designed for low bandwidth devices, like keyboards, mice, and printers, but then they got the bright idea of making it a low cost alternative to things like FireWire. So they tried to retrofit a design intended for one thing, and quelle surprise, it didn't really work so well.