The Mac ARM 64 build is now built with the OPENBLAS library, comparable with the INTEL ONEAPI MKL library used for the other platforms.
Added !DF f and !YSS s qualifiers (as in ASReml) which allow adjustment of the residual degrees of freedom (by f) and the total Sum of Squares (by s) as may be needed when analysing summarized data (using weights) or fitting a non-linear term in the model.