Universal binary plugin loads under Rosetta on Mac M1

1

My build machine is Intel i9 Macbook Pro, OS X 12.4. I have a typical JUCE plugin build - AU, VST, VST3, AAX. I spent some days getting my build updated for universal binary.

I have 4 dependent third party libs. Researched and re-built all of them for both x86_64 and arm64. Added arm64 to my projucer archs for my plugin. Built all of that successfully. Third party libs are .dylib. Ran “lipo -info” on plugin binary and all .dylibs - all show x86_64 and arm64.

On an M1 Pro Mac, using latest Reaper, I inserted AU and it spawned a Rosetta-looking plugin wrapper task in Activity Monitor, so my conclusion is that my plugin is still somehow running the intel slice.

Any ideas what could be causing that?

2

I’d it possible that this is reapers issue? What happens when you try to load that up in logic?

3

This usually happens when the host itself is started via rosetta, then all plugins will be loaded this way as well!

4

Good suggestion to suspect Reaper first. I got Logic installed on the device and inserted the plugin. I see “Logic” in Activity Monitor with Kind == Apple. I see “AU Hosting Service (Logic)” with Kind == Apple. I do not see any AUHostingCompatibilityService. So, hopefully that means all is good and my plugin is running natively on arm.