# Postprocess with prepassRenderer caused msaa not work

**URL:** <https://forum.babylonjs.com/t/postprocess-with-prepassrenderer-caused-msaa-not-work/33907>\
**Category:** Questions\
**Created:** [September 14, 2022, 1:48am UTC](https://forum.babylonjs.com/t/postprocess-with-prepassrenderer-caused-msaa-not-work/33907 "2022-09-14T01:48:44Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![Evgeni\_Popov](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/evgeni_popov/32/4432_2.png) [@Evgeni\_Popov](https://forum.babylonjs.com/u/Evgeni_Popov)\
**Post date:** [April 19, 2023, 8:13am UTC](https://forum.babylonjs.com/t/postprocess-with-prepassrenderer-caused-msaa-not-work/33907/5 "2023-04-19T08:13:30Z")

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What is the problem on Mac? Are there any error messages in the logs?

I have tested on iOS 16.4.1 and it does work (except for the antialiasing that does not work, but that’s a bug with latest iOS versions: [iOS Anti-aliasing issue April 2023](https://forum.babylonjs.com/t/ios-anti-aliasing-issue-april-2023/39886)).

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