Thanks for your effort John.
Following your instructions (and after sourceforge returned to the activity) I
have been able to install Qgis without major problems in a MacPro with 10.11.6
system.
The version installed is 2.99.20180124. Should not it be 3.0? Despiste this and
once installed,
The following notes are based on an install on a clean iMac (the disk has just
been replaced) running High Sierra (10.13.3). The installation was done using
MacPorts and their qgis3 port. When I describe more than one install method,
the first one is the one I used. These is no reason to be
