Open any HDRP project on mac with recent version. I used 2023.2.a19 with simple 3D HDRP template.

expected: console is clear

result: console has ~45 warning from various systems

One example:

Shader warning in ‘Deferred’: implicit truncation of vector type at kernel Deferred_Indirect_Fptl_Variant2 at /Users/motiejus.viltrakis/Documents/UnityProjects/Trash/Trunk-a19-3D-HDRP/Library/PackageCache/com.unity.render-pipelines.high-definition@16.0.2/Runtime/Lighting/LightEvaluation.hlsl(607) (on metal)

update: a lot of the warnings are also on windows dx11
update: they also appear in the HDRP Sample Scene project. 

Reproducible on 2023.2 and 2023.3