I just recently installed ChemDraw 15.1 on my new Macbook running macOS Sierra and can no longer change atom labels by hovering the cursur over an atom and clicking the relevant key on the keyboard. Likewise selecting a molecule and clicking the delete key on the keyboard no longer works. In both cases I simply get an error message reading:
The operation could not continue because the text cannot be represented by the selected font. (#-8738)
Any help or fix would be much appreciated as I require ChemDraw on a daily basis.
Cheers