P: Inaccurate selections with Radeon graphics cards on Mac OS

For better or worse all graphics driver updates for Apple are installed through system updates. So if the bug is on Apple's side we have to wait for them to fix it instead of updates from individual GPU makers. Chris mentioned that it's been seen mostly with Radeon, and is a GPU-related bug, but the issue appears to be on the system level as it relates to GPU, so we're waiting on Apple.

Read what I wrote. You're on MacOS 10.7, which has a whole new set of video card driver bugs.

Michael-

Can you comment on Chris's comment above about this being primarily a Radeon issue? We are definitely seeing it on NVIDIA cards as well.

The primary issues were with Radeon cards (AMD/ATI).

The graphics issues on 10.7 are different, though still caused by bugs in the video card drivers. We are continuing to work with Apple to get these bugs fixed in MacOS.

Hi Marshall,

Sorry, I don't have any more updates. Our developers are investigating the issue right now and they're aware that it's not just a marquee only issue, so hopefully they'll get to the bottom of this.

Michael, Any updates on this?

here's my machine info:
Graphics NVIDIA GeForce 8800 GT 512 MB
Memory 10 GB 800 MHz DDR2 FB-DIMM
Mac OS X Lion 10.7.2 (11C74)

BTW, this is definitely not a marquee only issue. As I mention above the problem also occurs with the Shape Tool, Color Picker, and sliders.

Same here! Tremendously frustrating.

Eye Dropper tool, Shape tools, Marquee tools, and even sliders on panels (sometimes i drag opacity down to 0 and then look back and it's mysteriously at 1)

Usually when drawing shapes, I keep an eye on the info panel so that i can see the pixel dimensions. For example, I'll drag a rectangle out to 200x200 as shown in the info panel - and again, as soon as I release it shifts to 200x199 or something.

With the eyedropper tool and color selector window open, i can put the cursor in one spot & press the mouse button down - see the color update accurately, but as soon as i release, the color updates to one of the neighboring pixels. Without moving the mouse, i can reproduce this behavior over & over...

Thanks for that, Matthew. I'll pretend Chris wrote that response.

The purpose of this support forum is for customers to indicate that they are having problems using Photoshop to do their jobs. Whose "fault" it is should not matter.

I think we (the paying customers) have done a lot to help identify the issue. For that, we get a guilt trip that we shouldn't be complaining. Wow.

I know customer service can be a difficult job. But frustrations like that should not be put on the customers.

My home machine: ATI Radeon HD 5750 1024 MB

Chris-

Let me suggest how you could have made the same point without sounding unprofessional.

"Thanks for keeping this thread going, folks. We are aware of this issue. We currently think that this problem it is related to a bug in an Apple graphics driver. We are doing all that we can and will update this thread as we know more. Some workarounds that have been suggested are (...)"