[Mesa-users] Fix for 'ld: library not found for -lSystem' on MacOS

[RICHARD H D TOWNSEND]

Hi folks --

A number of folks attempting to build MESA on MacOS have reported compilation errors of the form 'ld: library not found for -lSystem'.

This is ultimately due to an incompatibility between the MESA SDK and the recently-released Xcode 12.

To fix the problem, I've created a new release of the MESA SDK for MacOS. Download from here:

http://www.astro.wisc.edu/~townsend/resource/download/mesasdk/mesasdk-x86_64-macos-20.9.1.pkg

cheers,

Rich