Thomas Baumann wrote: > I have a similar problem with my DTP20, but on Mac OS X 10.9.5. It works fine > with V1.4.0 > (on OS X 10.6.8) but I get communication errors with V1.6.3, using either > chartread or > spotread. Should I try to compile V1.5.1 for use on OS X 10.9.5 or is there a > USB patch > for the latest Argyll version available? Hi, try <http://www.argyllcms.com/disptools_osx64_v1.7beta.tgz> Graeme Gill.