MSAA broken on M1 macs?

Unity Engine
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1

So I have some HDRP code that runs fine on an ancient Mac book laptop, but on a new M1 it doesn’t like the Antialiasing - might be MSAA in forward.
The screen goes black and the log is full of “RenderTexture.Create with bindMS failed: antiAliasing 8 with unsupported format” errors.

What is the issue here?

2

So I think M1 GPU does not support more than 4x MSAA - should Unity be handling that?