The error is different, it is related to png.
and the error message even tells you what Homebrew package to install and how.
* The following required packages can not be built:
* png
* Try installing png with `brew install libpng` and
* pkg-config with `brew install pkg-config`
Apparently, building Sage's png has failed for some reason...
On Wed, Oct 2, 2019 at 5:02 AM Ben Salisbury <bsalisbu...@gmail.com> wrote:
>
> Another build failure (seemingly at the same spot). The log file is attached.
>
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