# Laggy GUIs on OSX El Capitan?

**URL:** <https://forum.juce.com/t/laggy-guis-on-osx-el-capitan/15717>\
**Category:** Audio Plugins\
**Created:** [October 15, 2015, 10:09pm UTC](https://forum.juce.com/t/laggy-guis-on-osx-el-capitan/15717 "2015-10-15T22:09:34Z")\
**Posts on this page:** 1\
**Showing post:** 10

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**Author:** ![IvanC](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.juce.com/ivanc/32/685_2.png) [@IvanC](https://forum.juce.com/u/IvanC)\
**Post date:** [December 4, 2015, 11:57am UTC](https://forum.juce.com/t/laggy-guis-on-osx-el-capitan/15717/10 "2015-12-04T11:57:00Z")

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Nico : did you try to use a ChangeListener instead of a systematic repaint in the timerCallback ?

Anyway, one of my clients reported a very high CPU load for some simple visualization stuff on Mac OS X for a plug-in I have been working on, and the only solution available we have found is to use OpenGL too...

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