Compute Shaders - no error output for Mac/Metal

When I'm doing compute shader work on Mac I see no compile errors displayed, just missing kernels when those kernels contain errors and a blank 'output' window. I'm talking about basic syntax errors here... Weirdly I do see sometimes see warning messages but never the errors! I've seen this behavior on 2018.1 and 2018.2.

I compared with PC (Direct3D11) and there the errors show up just fine.

Anyone else seeing this? Is this a known Mac/Metal issue? Having to keep commenting stuff out to locate the error line gets old pretty fast I'm afraid