How to test in Retina resolution?

Unity Engine
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1

so, 2048 * 1536 resolution,

I just want to avoid it at my game. Now my game rejected because of UI’s miss-positioning at Retina resolution.

  1. How can I avoid retina resolution?
    I optimized my game only for iphone 4,5, ipad (1024 * 768 ).

  2. How to test retina resolution if I want?
    Do I need [Real] retina iPad?

2
  1. You can use SetResolution to force retina iPads to render in 1024x768 and scale it to full screen
    Unity - Scripting API: Screen.SetResolution