So there has been quite a bit of back and forth about Tablet support in X11 on OSX over the past few months on these lists. I've spent some time today cleaning it up some more and added support for differentiating between the pen and eraser, but I haven't tested it out due to lack of hardware here in the UK. It will be included in 2.3.1_rc4 when I get around to pushing that out. I tested Gimp.app for OSX, and it does not have tablet support. This is a Gimp.app bug. They need to compile gdk with XInputExtension support. I tested out a version of gimp compiled on a linux machine (using the Xquartz server), and it showed the devices when I clicked the 'Configure Extended Input Devices' button in Gimp's preferences (whereas the Gimp.app version does says it's not supported). If you care about having support for your tablet in Gimp.app, then you should report this bug to the Gimp.app maintainers and reference the fact that it works with the Xquartz server and gimp on linux. --Jeremy