I finally got it working and thought I'd post what I did for others that are new to OS X.
Download Instant Client
First you'll nee to download the Instant Client for OS X. I downloaded the following files for Version 18.104.22.168.0 (64-bit):
Unzip both files and put their contents in /oracle/instantclient_11_2/
You'll need to set the appropriate paths to load by default in Terminal. Open Terminal and run:
vi ~/.bash_profileAdd the following to the file:
#in ~/.bash_profile DYLD_LIBRARY_PATH=$DYLD_LIBRARY_PATH:/oracle/instantclient_11_2 export DYLD_LIBRARY_PATH PATH=$PATH:/oracle/instantclient_11_2/ export PATH #Create this directory and put your tnsnames.ora file in it TNS_ADMIN=/oracle/instantclient_11_2/network/admin/Running SQL*Plus
Now when you open a new terminal window you should be able to run SQL*Plus
#ex: sqlplus username/password@//server:port/sid sqlplus system/oracle@//localhost:1521/XE #or use a connection string leveraging a tnsnames entry
When using SQL*Plus in Windows you can use the Up arrow to get your previous command. If you do that in Linux you'll get some weird character. The good news is that there's a program to resolve it called rlwrap. CJ Travis has a good post on how to install rlwrap of Mac OS X.