On Thu, 6 Feb 2020 at 18:54, Han-Wen Nienhuys <hanwen@xxxxxxxxxx> wrote: > What is the right incantation to do printf of a uint64_t on OSX ? > > Apparently PRIuMAX is to be used for "uintmax_t", and not for "long > long unsigned int". You could cast it? Grepping around, that seems to be how PRIuMAX is used: printf("%"PRIuMAX"\n", (uintmax_t)var); Martin