“Apple Mach-O Linker (Id Error)”

Hello All,
I have created a VST3 for PC and I am now using the source files to create a Mac version in Xcode. I am receiving two “Apple Mach-O Linker (Id Error)” errors. What am I doing wrong? I attach two screenshots.


The error refers to code in include_juce_audio_plugin_client_VST3.old, why not include_juce_audio_plugin_client_VST3.cpp? The include_juce_audio_plugin_client_VST3.cpp/old is JUCE library code. Any suggestions what to do or where to begin?

I haven’t received any answer, so I will post this in the MacOSX section instead.