The solution on this thread worked for me: https://forum.hise.audio/topic/8218/warning-xcode-15/45

It could be that you are toggling the button "on and off", depending on the state at the start. Try adding something like this at the top of your button callbacks:

if(!value)
  return;

@d-healey Ah, ok. Totally missed that. Thanks!

@Mors Sorry, I wasn't very clear. You should navigate to users/your_username/Library/Audio/Plug-ins/Components in the MacOS Finder and you should have the component shortcut there which you can right-click. "Show Original" is a Mac Finder function.

Did you choose "Export as Instrument (VSTi/AUi) plugin" from the Export menu in Hise?

It should put a shortcut to your_project_name.component in Binaries/Builds/MacOSX/build/Release

If you right-click that file in Finder and click "Show Original", it should take you to users/your_username/Library/Audio/Plug-ins/Components

I am running HISE 3.6.2 on Sonoma. The solution in this thread works for me and I am able to successfully export plugins:
https://forum.hise.audio/topic/8218/warning-xcode-15/44?_=1709203602024

The solution on this thread worked for me: https://forum.hise.audio/topic/8218/warning-xcode-15/45