The USB matching in calibre appears to be mis-identifying this PocketBook model as a Bookeen Diva. I'll attach the whole of the debug info from my Mac, but it begins:
The device does actually have a model number of PB743K3, so that "product" value looks correct.
I can't tell if this misidentification is a problem or not, or which device I should choose in the setup wizard. Nothing marked "PocketBook" seems to match, FWIW.
Code:
USB devices on system:
[['0x1d6b', '0x104', '0x100', 'Obreey', 'PB743K3', '20080411']]
No disabled plugins
Looking for devices of type: MTP_DEVICE
No MTP devices connected to system
Looking for devices of type: SMART_DEVICE_APP
All IP addresses {'lo0': [{'addr': '127.0.0.1', 'netmask': '255.0.0.0', 'peer': '127.0.0.1'}], 'en0': [{'addr': '10.0.1.15', 'netmask': '255.255.255.0', 'broadcast': '10.0.1.255'}]}
No device is connected
Looking for devices...
USBDevice(busnum=1, devnum=1, vendor_id=0x1d6b, product_id=0x0104, bcd=0x0100, manufacturer=Obreey, product=PB743K3, serial=20080411)
Detected possible device DIVA
Devices possibly connected: Bookeen Diva HD Device Interface,
Trying to open Bookeen Diva HD Device Interface ...I can't tell if this misidentification is a problem or not, or which device I should choose in the setup wizard. Nothing marked "PocketBook" seems to match, FWIW.