Harbormaster: Build failure on OS/X build. How to fix it as a non Mac user

[Roland Senn]

Hi all,

Phabricator informed me, that the builds on Harbourmaster for my
changes failed. 

Looking at the log at https://phabricator.haskell.org/B21368 I can see,
that the builds on Linux and Windows succeeded, however the tests on
OS/X failed.

Looking at the failed tests at https://phabricator.haskell.org/harborma
ster/build/48354/ it tells me that the 2 tests TEST="T5631 T6048"
failed.

Now, I don't own a machine with OS/X. How can I look, what really
failed, and how can I try to fix it?

Many thanks
   Roland