Recently it was not possibly in master to open online help (F1).
This is also mentioned in issue #7915. However, on macOS there are likely
also other problems, which is why I'm hesitant to close that issue with
this fix.
(help.exe:57964): LibGimpBase-CRITICAL **: 15:24:38.792:
gimp_value_array_index: assertion 'index < value_array->n_values' failed
(help.exe:57964): GLib-GObject-CRITICAL **: 15:24:38.792: g_value_get_boxed:
assertion 'G_VALUE_HOLDS_BOXED (value)' failed
This was most likely caused by 8eb7f6df9e
Changing this to use args 0 and 1 instead of 1 and 2 fixes the problem.
cb47a72055