I don't have fpvectorial or TAChartFPVectorial installed. Do I need these packages?You do need then, but since they come with Lazarus the IDE seems to know where they are as I found out. So, this does not seem to be an issue.
The failure is caused by the fact that the TSVGDrawer.SetFont method is unable to load the font (the font is nil after calling LoadFont).There is a note in the svn commits for TAFonts.pas, r61240: "TAChart: Fix svg drawer not finding fonts on Mac (https://forum.lazarus.freepascal.org/index.php/topic,45461.msg321532.html)."