Q: iMac 4K, photoshop blinking, flashing into black while using brushes... anyone knows how to fix this bug? thank you in advance! and happy new year guys!

I had a 3 day "unacomplish-a-thon" with the Adobe techs not too long ago. It appears they have outsourced their support to a group of idiot reading off a flow chart who wouldn't know Photoshop if it bit them in the rear ends. I wish you luck, I truly do.

And this is not me being snarky, me being snarky is when I figured out what the problem is and refused to tell them when they asked. Adobe needs to be responsible and they are just cutting corners wherever they can.

Hi

i have the same problem and i have been on the phone to Apple and searched on here for answers... Can i ask, what your solution was?

THank you

HI, did you manage to fix it?

THanks

So, I made my cursor a tad bit bigger, like just passed the initial tick mark, and its seemed to have resolved the issue. Not sure whose problem this is, Adobe or Apple, but it definitely is a turn off to buying a 4K. It's supposed to be better, not problematic.

I've had this problem ever since I bought my iMac, 3 months ago. Nothing that Apple Care suggested seemed to work. Then, while fiddling cluelessly with the System Settings, I may have fixed it.

Go to Displays, choose "Scaled", and then select some resolution other than "default". Then, where you chose "Scaled", change back to "Default". This did the trick for me. Immediately after that, the flashes stopped and it's been a couple of weeks now.

By the way, this bug is not exclusive to Photoshop. It happens whenever a custom cursor changes back to a default one. Even some websites (like zappos) can suffer from this.