Roots Magic also has a Mac version.  (I am a PC person married to a Mac person).  Roots Magic also has a free version that you can start with, and then if you like it you can upgrade to the paid version without losing any data.  I have evaluated their PC Roots Magic Essentials - and can tell you that some things like descendants charts are only in the paid version - but you can certainly start with the free version.  Family Tree Maker also has a Mac version but it is not free.  

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Sarah L Meyer
Georgetown TX
ANK(I)ER, BIGOS, KARMELEK, PERLSTADT, STOKFISZ, SZPIL(T)BAUM, Poland
BIRGARDOVSKY, EDELBERG, HITE (CHAIT), PERCHIK Russia (southern Ukraine) and some Latvia or Lithuania
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