# Metal Shading Language ## Identification Apple's GPU programming language and compiler environment, recorded as `MTL Compiler` beside OpenGL ES and cross-platform graphics components. ## Notebook evidence - [[Scanned_20260730-1946|Scanned_20260730-1946]], PDF page 2. ## Relationships and evidentiary boundary [[Apple]] · [[OpenGL ES]] · [[Rosetta 2]]. The notebook occurrence records research context and page-level proximity. It does not by itself establish ownership, deployment, compromise, coordination, or present-day status.