Directory where MESA is installed on the local hard drive.
%MESADIR% is en environment Variable that must be set before you run maya.
You can edit that path into the config/mesa_config.bat file, by replacing the path of the Environment variable that is named ” %MESADIR% ”
in version MESA 1.1 do not exists
with MESA 2.0 / 2.01 you must to restart maya to apply the environment variable modifications.