Hmmm ... I'm at a loss to explain the problems you're having. I don't have the 1061 - I've got the 636
, but the mac software is the same. I have it running on a late 2009 27" iMac Core i5 with 10.7.5, and on an Early 2008 MBP 17" with a Core 2 Duo, also with 10.7.5. LadyAda has also tested it out with 10.8.2 (not sure what kind of machines). The iMac has a Radeon GPU and the MBP a GeForce.
What does System Report - Hardware - USB show for your scope? Can you paste that here? I wonder if there's some hardware change that might explain this?