After much effort I have compiled and installed DBG dbg-2.11.32
on MacOS X with the intention of using it with PHPEclipse.
A php web page that executes phpinfo() shows the dbg.so info
so it is actually loading.

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I can't get this to this to work: it wont stop on a break point.
I get this message in the Eclipse console:
dyld: NSLinkModule() error
dyld: Symbol not found: _zend_ini_boolean_displayer_cb
Referenced from: /usr/lib/php/extensions/dbg.so
Expected in: flat namespace

In the Eclipse PHP Browser I see:
http://localhost/iEPM/DebugTest.php?DBGSESSID=1@clienthost:10001
and the page exceutes OK.

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I then managed to get the dbg-cli client to compile,
again with much exertion. It runs and takes commands
but it does not connect to the debugger.

I did a port scan with the dbg-client in listen mode and no
ports showed up.

Ideas anyone ??

it means that all symbols are stripped off in the php binary (either php or libphp4|5.so) you're using.
I'd recommend you change the php distribution or compile php yourself.
Dbg has nothing to do with this problem.