The default value used in this work (α_MLT = 1.5) might have been changed for specific comparisons (the MESA default values are Z = 0.02 and α_MLT = 2.0). The mixing length parameter in the GENEC models is individually specified for different mass ranges, α_MLT = 1.6 and 1.0 for masses below and above 40 M_⊙, respectively.

The opacity tables are based on the radiative opacities from OPAL (Iglesias & Rogers 1993; Iglesias & Rogers 1996), but also several other sources are used, accounting for (very) low and high temperature ranges.

The nuclear reaction rates are calculated by using and extending/complementing the specific databases, e.g., NACRE (Angulo et al. 1999) for the Geneva models; in MESA, REACLIB (Cyburt et al. 2010) or optionally NACRE can be used. For our own MESA calculations, we used the default “basic.net”. The Bonn code uses “own” reaction networks, but we were not able to identify the corresponding sources.

Brott et al. (2011) used the Spruit-Tayler dynamo mechanism for angular momentum transport but not for chemical mixing. Our own MESA models have be calculated in analogy.

Other mass-loss prescriptions are available for different evolutionary stages.