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what might cause macOS app to render all blurry on retina macOS

I have a problem in my existing macOS project. My windows/views render all blurry on a retina Mac when I run it. It look perfectly fine in Xcode when working with the storyboard.

If I add a new window to my existing app it looks like this (all blurry):

enter image description here

while when I do a new project it looks like this (perfectly sharp):

enter image description here

i am searching for what might cause this for hours now but am still without a clue. Does anyone know what might influences the rendering of my macOS app?

Solution

  • Turns out I had to set 

    NSHighResolutionCapable

    to 

    yes

    in my projects plist file. Not sure tho what exactly is different on the "new" project that removes the necessity to do this.

    with this property my old project is rendering properly now.