This conversation has been merged. Please reference the main conversation: Lightroom CC 2015.8: Tone curve still broken in
I found this video (link below) on YouTube of others who are having the same issue.
The video description describes the problem well.
I used to rely heavily on curves to make my major adjustments but now the panel is basically unusable. Very frustrating...
Please let me know if there's anything I can do to fix it.
2013 Mac Pro
OS Sierra 10.12.1
Adobe Lightroom 2015.7
Same results whether using a mouse or trackpad.