Follow ALL these instructions to successfully install and run inkscape 0.91 on MacOS version 10.7-10.10. Skip instructions if you don’t want it to work properly. More up to date (but less detailed) install instructions are found on this page:
Update: I suggest using ArcGIS Pro instead of ArcMap – if you need help with this let me know.
This tutorial covers plotting structural geology data in ArcGIS. In this tutorial I am going to use the example of plotting foliation data, but this is applicable to any data where a rotated symbol is required.