pgAdmin install on mac - does not work

Trying to get pgAdmin3 installed  on my mac (16G i7 4 core CPU,  OSX 10.11). I have tried 1.20 and 1.22 and 1.22.1

When I try to install, it goes up to a point of showing me the pgAdmin elephant but then my CPU shoots up to 100% and stays there.

There is background window that opens up 

/usr/local/greenplum-clients-4.3.5.1-buid1 pops up when I click on the pgAdmin screen icon.

I had nothing else running (activity monitor would show 100% CPU 4 threads).

Online research did not yield anything. Another colleague of mine has exact same issue.