Well, I get a new computer (Max Pro 10.10.2+Retina Display) and I download minecraft. Right when I go into F11, everything blurs up. I am using minecraft 1.8 with the launcher version 1.6.11. I click the new maximize button and still blurry. I play minecraft in any mode that I think will help, its all blurry.
Remember, all this blurryness happens in the game.
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Thank you for your report.
However, your ticket has been resolved as a duplicate.
This issue has been linked to the original bugreport: MC-32327. You can find or add further information on that report.
Please search before reporting any bugs, as it's likely that one exists already.