HRD showing the evolution tracks of the 2D models for a 12 M_⊙ star (Z = 0.012, X_i = 0.71) for (Ω_eq/Ω_c)_i = 0.15 (dashed-dotted), and 0.5 (dashed). The black lines represent the properties at the pole, the grey lines the properties at the equator. The tracks are terminated slightly before the TAMS when the solver can no longer converge, which occurs at X_c/X_ini = 0.141 and 0.131 for the respective aforementioned rotation rates. The dots mark the model of HD 192575 that is discussed in Sect. 3.