My apologies - of course you are correct and it is a camera recognition issue.

Here is what I see with the SX-46 plugged into the USB port of the computer. The SX-46 hub is connected to the SX-AO, SX filter wheel and Ultrastar:
USB 2.0 Bus:

Host Controller Driver: AppleUSBEHCIPCI
PCI Device ID: 0x1c26
PCI Revision ID: 0x0005
PCI Vendor ID: 0x8086

Hub:

Product ID: 0x2513
Vendor ID: 0x0424 (SMSC)
Version: b.b3
Speed: Up to 480 Mb/sec
Location ID: 0xfd100000 / 1
Current Available (mA): 500
Current Required (mA): 2
Extra Operating Current (mA): 0
Built-In: Yes

USB2.0 Hub:

Product ID: 0x6572
Vendor ID: 0x04b4 (Cypress Semiconductor)
Version: 32.99
Speed: Up to 480 Mb/sec
Location ID: 0xfd120000 / 3
Current Available (mA): 500
Current Required (mA): 100
Extra Operating Current (mA): 0

SxFilterWh:

Product ID: 0x0920
Vendor ID: 0x1278
Version: 0.01
Speed: Up to 12 Mb/sec
Manufacturer: SxFilterWh
Location ID: 0xfd124000 / 6
Current Available (mA): 500
Current Required (mA): 300
Extra Operating Current (mA): 0

ECHO2:

Product ID: 0x0525
Vendor ID: 0x1278
Version: 0.00
Speed: Up to 480 Mb/sec
Manufacturer: Starlight Xpress
Location ID: 0xfd122000 / 5
Current Available (mA): 500
Current Required (mA): 300
Extra Operating Current (mA): 0

ECHO2:

Product ID: 0x0604
Vendor ID: 0x1278
Version: 0.00
Speed: Up to 480 Mb/sec
Manufacturer: Starlight Xpress
Location ID: 0xfd121000 / 4
Current Available (mA): 500
Current Required (mA): 300
Extra Operating Current (mA): 0

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: 0xfd110000 / 2
Current Available (mA): 500
Current Required (mA): 100
Extra Operating Current (mA): 0
Built-In: Yes

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