I'm new to HISE and since the plugin it was part of the project, wanted to see if it worked. My guess is people are using HISE in standalone as a development system to create custom instruments and exporting them to AU, etc.

Yes. Same problem. I'm using Xcode 12.01 on a M1 Mini (Big Sur) so the build is Intel only.

Error Group
Undefined symbol: typeinfo for juce::Timer
Undefined symbol: juce::Component::mouseMove(juce::MouseEvent const&)
Undefined symbol: juce::Component::mouseDown(juce::MouseEvent const&)
Undefined symbol: juce::Component::mouseDoubleClick(juce::MouseEvent const&)
Undefined symbol: juce::Component::setName(juce::String const&)
Undefined symbol: juce::Component::setVisible(bool)
Undefined symbol: juce::Component::addToDesktop(int, void*)

this is just a snippet- there are a total of 100 errors. This seems to be related to the lto.o compiler errors?

I'm getting Xcode errors when building the AU plugin. The standalone version builds fine. Any suggestions?