[CLIENT] Log-in Screen Image Size Error

The log-in screen animation for mac computers, or at least my MacBook Air, is to small for the actual game panel.This has occurred as far back as approximately Rek'sai's opening into League as far as I can remember. Recently it was fixed in the 5.2 update with DragonSlayer Pantheon as the log-in wallpaper. This issue only occurs for the menu animations, which when switched off, resizes the image to it's proper size.

To recreate this issue: -On a (my) Macintosh Computer -Launch LoL -Check the Animation box -Unchecking & rechecking the box makes no difference (As seen in the video)

*Note: I have no knowledge of this occurring to any other players or any other computers.

Thank you for your time and consideration.