I recently replaced an older Focusrite audio interface with a Presonus Studio 1824c interface and was very disappointed to discover that loopback was not supported on macOS by Presonus. This was particularly disappointing after having had this feature for years on an older interface. I see that it is supported on Windows, but I know that is is possible to support on macOS. I have a terrible work around for this, but it's a real pain and I can't recommend Presonus to anyone else until this key feature is supported on macOS.
