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**Table of Contents** *generated with [DocToc](https://github.com/thlorenz/doctoc)*
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- [Cocos2d-x 4.0 Release Notes ](#cocos2d-x-40-release-notes )
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- [Highlights ](#highlights )
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- [Documentation ](#documentation )
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# Cocos2d-x 4.0 Release Notes #
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This version is mainly to support metal on iOS/macOS. In order to support metal, this version does a big refactor of the rendering system. And this version also remove deprecated functions, so there are some API modification.
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In order to help develpers easily update to v4, we wrote some documentations. These documentations can be found [here ](https://docs.cocos.com/cocos2d-x/v4/manual/en/upgradeGuide/ ).
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## Highlights
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- support metal on iOS/macOS
- use CMake for all platforms
- update GLFW to 3.3
- update minizip to 1.2
- remove deprecated functions
- remove h5 engine and JSB
- remove tiff
- remove `SimpleAudioEngine`
- remove `experimetnal` namespace
- fix bug that system font can not work correctly on macOS15
- fix lua crash issue on 64bit devices
- fix bugs for iOS13
- UIWebView uses WKWebView instead
- VideoPlayer uses AVPlayerController instead
## Documentation
We wrote some documentations to help developers upgrade to v4:
- [how to run tests and how to create a new project and run ](https://docs.cocos2d-x.org/cocos2d-x/v4/en/installation/ )
- [v4 updrade guide ](https://docs.cocos2d-x.org/cocos2d-x/v4/en/upgradeGuide/ )
