Configuring the port numbers on OS X not working

I've finally gotten 0.18 running on my MacBook but am seeing some discrepancies.

My hadoop-site.xml contains:
...
<property>
<name>fs.default.name</name>
<value>hdfs://Ryans-MacBook.local:9000</value>
<description>The name of the default file system. A URI whose
scheme and authority determine the FileSystem implementation. The
uri's scheme determines the config property (fs.SCHEME.impl) naming
the FileSystem implementation class. The uri's authority is used to
determine the host, port, etc. for a filesystem.</description>
</property>

<property>
<name>mapred.job.tracker</name>
<value>Ryans-MacBook.local:9001</value>
<description>The host and port that the MapReduce job tracker runs
at. If "local", then jobs are run in-process as a single map
and reduce task.
</description>
</property>
...

However, I can only access the NameNode and JobTracker at ports 50070 and 50030. Why is that? Also, it seems that when I use localhost rather than Ryans-MacBook.local, I get a bunch of connection errors when I do a bin/start-all.sh. By the way the window title of the NameNode browser is set to "Hadoop Namenode 10.0.1.8:9000".

These are a few of the issues I've had which I can only guess are due to slight differences in OS X vs Linux.

Thanks,
Ryan