# How to emulate Eye Adaptation for Mac OS X?

**URL:** <https://forums.unrealengine.com/t/how-to-emulate-eye-adaptation-for-mac-os-x/327166>\
**Category:** Rendering\
**Tags:** MAC-OS-X, Post-Processing, Eye-Adaptation, unreal-engine, Auto-Exposure, question\
**Created:** [July 31, 2015, 11:22am UTC](https://forums.unrealengine.com/t/how-to-emulate-eye-adaptation-for-mac-os-x/327166 "2015-07-31T11:22:45Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![anonymous\_user\_2f6151721](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_2f6151721](https://forums.unrealengine.com/u/anonymous_user_2f6151721)\
**Post date:** [July 31, 2015, 11:22am UTC](https://forums.unrealengine.com/t/how-to-emulate-eye-adaptation-for-mac-os-x/327166/1 "2015-07-31T11:22:45Z")

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I want to heavily use [Auto Exposure/Eye Adaptation](https://docs.unrealengine.com/latest/INT/Engine/Rendering/PostProcessEffects/AutomaticExposure/index.html) feature in a very contrast environment, but it’s not working for Mac OS X. According to the topic “[Auto Exposure does not work on Mac OSX](https://answers.unrealengine.com/questions/33667/no-auto-exposure.html)”, it’s not supported on OSX’s version of OpenGL. However, in a number of OS X games I’m able to see it on the same hardware and OS. I think that it can be easily emulated overpassing OpenGL.

How it can be emulated in UE4? In postprocess material, tone mapper or in some engine code modifications? Where and how?