PS CS6, Apple OSX Yosemite, Wacom Intuis tablet/pen problems

Question

I run PS CS6 on an Apple Mac Pro, OS X v 10.10.3 (Yosemite), to which I recently upgraded.  When I upgraded to Yosemite I started to have problems with my Wacom Intuis Pro graphics tablet & pen.  The pen does not work smoothly with the tablet - in particular when holding down the Space Bar and scrolling around an image file it takes significantly more pressure than it should.  I have experimented with changing the Pen Pressure in the Wacom Pen Driver but that does not fix the problem.
Another problem is when using the Spot Healing Brush, rather than the immediate effect of the Tool showing, instead I get a black mark — more like I am painting with the Paint Brush & black ink.  That black mark remains until I touch the Wacom Pen to the tablet again - then the Spot Healing Brush effect appears but the black mark moves to the second point of contact.  I have been going back & forth with Wacom (Intuis) for six days and they say the pen & tablet appear to be fine, but there is some kind of conflict with Photoshop.  I do not have these problems when using the Mouse, only the Wacom Intuis Pen & Tablet.
When I open the Brush pallet, I cannot change any of the Brush Tip Shape settings.  None of them are checked, and they are all Locked.  How do I Unlock them?  Wacom tech support seems to think these PS Brush Settings are affecting the Pen.
Any other suggestions will be very welcome, I am going crazy with this problem and have spent untold hours trying to resolve it.  Thank you in advance!  Mark Weidman

Answer 1

I had the SAME problem. This worked for me:
Before, I was running Yosemite 10.10 on an iMac i7
I had the latest driver from Wacom (I tried a couple of older drivers, to no avail)
I'm running PS CS6, with all update
I'm using a Wacom Intuos 5 medium tablet
I was getting super bad lag while using the brush and other tools. Let's say I'd open an image to edit. After selecting the keyboard shortcut for my brush, I'd make one pass with the brush on the image. The brush stroke would be there, but it wouldn't show up in the history palette. Only after making another brush stroke would the previous action be recorded in the history palette. I was lagging real bad. In between brush strokes I wouldn't be able to change tools or even change the size of my brush. Nothing worked. I'd have to click off the image to regain control, or click the trackpad to regain control. BTW, the trackpad worked perfectly. NO lag for anything in PS. The polygonal lasso tool, one of my favorite selection tools, was basically unusable with the lag. I'd have to click several times before it would catch up and then sometime it would just randomly close the selection. So that was useless.
Ok, so that's what was happening to me. My tablet was basically useless. It took triple the time to work with it.
All I did was update Yosemite to 10.10.1 and the tablet now works PERFECTLY in photoshop cs6 for me. I'm not sure you'll get the same results but it worked for my computer. I really didn't think it would work so I was pleasantly surprised when it did.
I had tried installing older wacom drivers. Didn't work.
I tried reinstalling PS CS6 in a new user profile on my Mac. Didn't work.