I have a Macbook Pro with retina display and with the highest RAM. It is Photoshop CS5 12.0.x. and my display resolution is checked as “best for display” on the system preferences. The program runs as usual except for the blurriness, and when I tried to update photoshop it said it failed and I should try again later.
It's minimal and slightly hard to see from the screenshots, but I figured it was an issue worth addressing.
