Formal releases are not very frequent. It’s a lot of work for Jürgen to prepare them It is preferable, IMHO, to use the current trunk from <http://svn.savannah.gnu.org/svn/apl/trunk <http://svn.savannah.gnu.org/svn/apl/trunk>> I am on Yosemite 10.10.5 using Xcode 6.4 - except for the ./configure which I do in Terminal.
Revision 891 builds clean (except for warning about no native code for PostgreSQL - which is OK as I don’t have it installed) If you are using Xcode and run into issues I may be able to help. Also there is a little pdf file named APL-on-Macintosh in the Doc folder which may be helpful. regards… Peter