Yeah, it’s ‘VSTPluginMain’.
This means that the plug-in is correctly exporting the only needed symbol for the host.
The next thing you can check is if your plug-in gets refused by the dynamic linker to load into Live.
Tick the options ‘Dynamic Library Loads’ in the Xcode scheme editor : Run->Diagnostics.
And set Live as Debug executable and run your plug-in and watch the debugger output for logs generated by the dynamic linker.
Maybe there’s something of interest.