Warning: this page describes the GTK-OSX port of GRAMPS to Mac, which is still under test. This page too is still under construction. The program described may not work as expected. Or even work. Use it on precious data at your own risk!This warning indicates that the program isn't quite yet ready for everyone. But those who are more willing to experiment with software still being tested may be curious. Its test status relegates it to a secondary software program at this stage, but it is a free download, so there is no monetary investment.
From this report I learned my great grandmother, Margaret Denyer Van Every, was one month shy of her 15th birthday when she married, and two months shy of her 16th birthday when she had her first child. I knew she had been young, but I hadn't done the math. My great grandfather was five years older.
However, it does illustrate a flaw in the code, as it appears GRAMPS occasionally gets confused over which of several spouses the correct ancestor is. Here it lists my great grandmother, Margaret Jane Denyer, as the daughter of George Foster - who was the second husband of Sarah Ann Hartley, not her first husband, Ebenezer Denyer.