I would also suggest trying to build the latest development version (currently Sage 9.2.beta11) instead of Sage 9.1.
On macOS 10.14.6 I had trouble with a range of Sage versions around Sage 9.1 but recent betas have been building fine for me. I would suggest changing to your Sage root directory and running: ``` $ git checkout develop $ git pull origin develop --tags $ make configure $ ./configure $ make -s V=0 ``` Also, you might consider switching package manager from MacPorts to Homebrew, since Sage supports getting many system packages from Homebrew. I opened a ticket for also supporting MacPorts: - Support getting system packages from MacPorts https://trac.sagemath.org/ticket/30504 but cannot promise whether or how soon that might happen. -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/c27a79a0-6caa-4ff9-9232-3bc737fb669bo%40googlegroups.com.