Hey Michael. Thx.
I already did this. But it didn't work.
I already restarted the system too.
Hi. I tried to replicate the problem, but I'm afraid it worked fine for me. Same setup as you - Sierra 10.12.5 and Photoshop CC 2017. Since resetting preferences didn't fix it, perhaps it's a keyboard problem. Can you test this with another keyboard?
Just realized that this happens ONLY when I scale using my Wacon Intuos. When I scale with the trackpad it works fine.
Does anyone know how to fix it?
I just found the solution here: Shift function doesn't work the same for Wacom tablet in Illustrator 17 as with mouse
I installed a older version from my Wacon driver and now it works fine. Thx!