No brush straight lines on a Mac using Intuos Pro

[susanm61191270]

I am unable to paint a straight line with the brush tool using shift. Same result whether I paint while holding shift to create a vertical or horizontal line or click shift click for a diagonal. It works when using my mouse but not with my Intuos Pro. Can anyone help?

I'm running the latest version of PS on Yosemite.

Thanks in advance

[susanm61191270 · Accepted solution]

It was the Wacom drivers. A new update from December 27th fixed the issue.

[Trevor.Dennis]

Susan, thanks for the feedback.  That is going to help a lot of other people.