Update Wacom drivers helps! (Was: 6.3.20; Now: 6.3.30-2).
By the way, seems like the Mac version doesn't have "windows ink" option. As far, as I understand, the issue with it is Windows-related.
Thank you, this is a huge relief
Recent community posts
UPD: for Unity version 2017.1.5f1
Just checked with another version. There is the same issue too, but slightly different which is weird.
If I click on the particular frame with my touchpad(not tablet), frames won't change unit I draw one line and after that -- same behavior.
However, with this, I at least can calmly draw one line, heh.
I upload another video with it: google drive
As the title says a frame is changing while moving a cursor in the drawing area. I suppose it's not okay since you can't calmly draw, frames are just changes if the cursor is on the same "vertical line". Also, I didn't notice similar behavior on your videos. I didn't push the "record" button(it's working properly). Shortcuts work ok as well, including "Next/Previous Frame".
I recorded a video, where you can see it: google drive
Here, I didn't push any button, just moving a cursor or draw.
OS: macOS High Sierra 10.13.5
Unity version 2018.2.5f1
Drawing via Wacom Tablet (touchpad same behavior)