# XCode 11 and macOS 10.8/10.9

**URL:** <https://forum.juce.com/t/xcode-11-and-macos-10-8-10-9/36701>\
**Category:** Audio Plugins\
**Created:** [December 17, 2019, 1:02pm UTC](https://forum.juce.com/t/xcode-11-and-macos-10-8-10-9/36701 "2019-12-17T13:02:01Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jakob-2](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.juce.com/jakob-2/32/783_2.png) [@jakob-2](https://forum.juce.com/u/jakob-2)\
**Post date:** [December 17, 2019, 1:02pm UTC](https://forum.juce.com/t/xcode-11-and-macos-10-8-10-9/36701/1 "2019-12-17T13:02:01Z")

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hey there - after we upgraded to macOS 10.15 Catalina and XCode 11 (using the then default 10.15 SDK) our plugins did not run any more with AU on macOS 10.8 and 10.9.

VST worked just fine.

Now we configured XCode to use the 10.14 SDK and everything seem to work fine.

Just saying in case anyone else has these issues. Is there and flaw that you’d see in using the 10.14 SDK?

Or does anyone know if there’s another way to get AU running on macOS 10.8 when using XCode 11 on macOS Catalina with 10.15 SDK?

We are sure that it’s not a notarization issue of our plugins.

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**Author:** ![pflugshaupt](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.juce.com/pflugshaupt/32/13206_2.png) [@pflugshaupt](https://forum.juce.com/u/pflugshaupt)\
**Post date:** [December 17, 2019, 1:19pm UTC](https://forum.juce.com/t/xcode-11-and-macos-10-8-10-9/36701/2 "2019-12-17T13:19:53Z")

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this is probably the same issue as the one in another thread:

> [@Plug-in built with Xcode 11 fails to load on Yosemite (10.10)](https://forum.juce.com/t/plug-in-built-with-xcode-11-fails-to-load-on-yosemite-10-10/35912/36):
>
> Yep, will do that today. It seems that most DAW makers are building against an older SDK.

Or did you successfully check 10.10 with an 10.15 SDK build?

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**Author:** ![jakob-2](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.juce.com/jakob-2/32/783_2.png) [@jakob-2](https://forum.juce.com/u/jakob-2)\
**Post date:** [December 17, 2019, 1:39pm UTC](https://forum.juce.com/t/xcode-11-and-macos-10-8-10-9/36701/3 "2019-12-17T13:39:50Z")

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Wow cool, indeed, it’s simply the same issue (and no, we did not check with macOS 10.10) - pflugshaupt, thank you so much!