I've been plagued with constant crashes of Slic3r 1.2.9 but have had no success trying to build a development version of Slic3r. It may be because of incompatibilities of some of the pieces with MacOS Sierra. I have a binary of 1.30.25RC1.3 that does not crash but gives an error (AMF processing requires XMLAX) that I have not been able to fix. Does anyone have a binary of a recent development version they could share? Thanks.