Brother's Keeper is not available for Mac but there are plenty of alternatives that runs on macOS with similar functionality. The best Mac alternative is Gramps, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to Brother's Keeper and 12 are available for Mac so hopefully you can find a suitable replacement. Other interesting Mac alternatives to Brother's Keeper are webtrees (Free, Open Source), Heredis (Paid), RootsMagic (Paid) and MacFamilyTree (Paid).
Webtrees is a free, open source, website based, collaborative genealogy application. It works with standard GEDCOM files and is installed on a web server using PHP and MySQL (or Postgres, SQL Server, or SQLite).
Explore your personal family history and discover your origins, your ancestors and how your family has evolved over the course of time. MacFamilyTree offers numerous options for you to capture and visualize your family history.
Ancestris is a free software suitable for all genealogists. It is available on all operating systems. It strictly respects the GedCom 5.5 and accepts 5.5.1 standard as it directly writes all information into the Gedcom file.
GeneWeb is a genealogy software program with a Web interface. It can be used off-line or in a Web environment. It uses very efficient techniques of relationship and consanguinity computing, developed in collaboration with Didier Rémy, research Director at INRIA.