下载地址 http://www.oracle.com/technetwork/topics/intel-macsoft-096467.html
安装方法：1. Download the desired Instant Client ZIP files. All installations require the Basic or Basic Lite package.
2. Unzip the packages into a single directory such as “/opt/oracle/instantclient_11_2” that is accessible to your application.
3. Create the appropriate libclntsh.dylib and libocci.dylib links for the version of Instant Client. For example:
cd /opt/oracle/instantclient_11_2 ln -s libclntsh.dylib.11.1 libclntsh.dylib ln -s libocci.dylib.11.1 libocci.dylib
4. Set the environment variable DYLD_LIBRARY_PATH to the directory created in Step 2, for example:
export DYLD_LIBRARY_PATH=/opt/oracle/instantclient_11_2:$DYLD_LIBRARY_PATH
5. To use supplied binaries such as SQL*Plus, update your PATH environment variable, for example:
export PATH=/opt/oracle/instantclient_11_2:$PATH
6. Start your application.