On Intel Mac 10.6.6 Argyll v1.3.2 having problem getting brand new i1Pro Rev.D connected in chartread or spotread with following error spotread: Error - Configuring USB port 'usb:/bus26/dev5/ (GretagMacbeth i1 Pro)' to 1 failed with -4 (No such device (it may have been disconnected)) or after switching ports: chartread: Error - Configuring USB port 'usb:/bus29/dev2/ (GretagMacbeth i1 Pro)' to 1 failed with -4 (No such device (it may have been disconnected)) About This Mac shows: Host Controller Location: Built-in USB Host Controller Driver: AppleUSBUHCI PCI Device ID: 0x2830 PCI Revision ID: 0x0003 PCI Vendor ID: 0x8086 Bus Number: 0x1d eye-one : Product ID: 0x2000 Vendor ID: 0x0971 Version: 3.00 Speed: Up to 12 Mb/sec Manufacturer: GretagMacbeth Location ID: 0x1d100000 Current Available (mA): 500 Current Required (mA): 500 Have tried 2 USB ports, one on computer, other in powered USB hub. Works OK with XRite apps, which are not running at same time as Argyll. Argyll worked well with old DTP41 for several months. i!Pro works well on old G4 PowerBook, without errors. The G4 also has had the XRite apps running. Phil Cruse