Hi Mark, I had similar, but not the same, problems last year, with OSX 10.6.6, and had a lot of help from Graeme (around Feb 8, 2011). "i think I've fixed it now. Found info on X-Rite site, about Difficulty connecting X-Rite hardware to third-party software and turning OFF i1Pro in X-Rite Device Services Preference Pane. http://www.xrite.com/product_overview.aspx?ID=1161&Action=support&SupportID=4980 Any way to override this, so you don't have to keep switching on/off? Phil Cruse" May not like having i1 running with Argyll and X-Rite software at the same time. Good luck, Phil On 26 Feb 2012, at 19:12, Mark MacKenzie wrote: > I am working through Phil Cruse's suggestions and all have worked to help me > get started on MacOS with ArgyllCMS and my i1Pro. > > BUT, upon running the terminal command: chartread Chartname (appropriate > name inserted for chartname) I get an error. The complete message from > terminal is as follows: > > chartread Pro4000_MIS_OffDepot_PhotoMatte > chartread: Error - icoms - usb_is_usb_portno: port number out of range! > > I am using the standard i1Pro and a recent iMac with the i1Pro directly into > one of the USB ports on the back of the iMac. > > Any suggestions on either finding the correct port number of using one that > works? > > Mark >