I've replaced /Library/Desktop Pictures/Sierra.jpg with a custom background image. Now, macOS Sierra applies the blur effect on my custom background image as well. I am looking for a reliable solution to turn it off e.g. overwriting a plist preference file or any non-hacking workaround?
How can I completely disable the login screen background blur and show a crystal clear login image?
Best Answer
Do this:
This will replace the blurred original image with the new one unblurred.