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Hello! I am having this same problem! (The straight line at the beginning of the round shape. Also, in a curved line, it can be blocky- as if made up of straight lines. I’ll try some of these resolutions but I see that many of these seem to be rooted in Windows and I am on a Mac OS so wanted to see ...

Yes, as Dave mentioned above, I do have it working on my Mac laptop (with High Sierra OS) now. It does seem that the order discribed above DOES matter. I think I had re- installed TVPaint first and then the new driver and it seems you have to do the driver first. I ended up having to uninstall both ...

Dave N. and TVPaint- I'm having the same issue (on a Mac Laptop that has been upgraded to OS High Sierra) and my dongle (which was working on my iMac set up that does NOT have High Sierra) is now not working. I've downloaded about three different drivers as stated in a couple of these threads and st...