As you can see..The Camera info is not there. What cause this file to be erased?
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System Information> Hardware > USB
USB High-Speed Bus:
Host Controller Location: Built-in USB
Host Controller Driver: AppleUSBEHCI
PCI Device ID: 0x1c2d
PCI Revision ID: 0x0005
PCI Vendor ID: 0x8086
Bus Number: 0xfa
Hub:
Product ID: 0x2513
Vendor ID: 0x0424 (SMSC)
Version: b.b3
Speed: Up to 480 Mb/sec
Location ID: 0xfa100000 / 2
Current Available (mA): 500
Current Required (mA): 2
Apple Internal Keyboard / Trackpad:
Product ID: 0x0245
Vendor ID: 0x05ac (Apple Inc.)
Version: 1.08
Speed: Up to 12 Mb/sec
Manufacturer: Apple Inc.
Location ID: 0xfa120000 / 4
Current Available (mA): 500
Current Required (mA): 40
BRCM2070 Hub:
Product ID: 0x4500
Vendor ID: 0x0a5c (Broadcom Corp.)
Version: 1.00
Speed: Up to 12 Mb/sec
Manufacturer: Apple Inc.
Location ID: 0xfa110000 / 3
Current Available (mA): 500
Current Required (mA): 94
Bluetooth USB Host Controller:
Product ID: 0x821a
Vendor ID: 0x05ac (Apple Inc.)
Version: 0.37
System Speed: Up to 12 Mb/sec
Manufacturer: Apple Inc.
Location ID: 0xfa113000 / 6
Current Available (mA): 500
Current Required (mA): 0