Linking Executable on MacOS Catalina 10.15

[Jeff_Tullin]

Very long shot…
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What Could Cause this linker error in 2019R1... Plugin or xojo?

I have an app started in 2019r1 and worked in in 2022R1. I meant to keep it 2019R1 compatible. And i did not use any features not in 2019R1. the project opens in 2019R1 but when I go to run I get a linker error: Linking Executable ld: file not found: /System/Library/PrivateFrameworks/UIFoundation.framework/Versions/A/UIFoundation for architecture x86_64 The problem is if I compile it in 2020R2 there are issues running on Mac High Sierra that I don’t see on Monterey so I wanted to compile in …