I had no luck, until I removed the trailing / in ORACLE_HOME, then everything Just Worked.
Read the directions carefully. There are some important bits that are easy to miss.
Don’t try to install on an Intel Mac. Its not worth your effort (as of this writing). I thought I’d be smart and get Oracle working on my MacBook Pro before trying on the server. There are a couple places where you have to deviate from the instructions for a Mac (nothing difficult), but in the end you get punished for having an Intel Mac.
If you to try to install on a Mac, follow the instructions above, and change the symlink in Step 2 to ln -s libclntsh.dylib.10.1 libclntsh.dylib
In Step 3, change LD_LIBRARY_PATH to DYLD_LIBRARY_PATH.
There may be others. This is where I got punished and gave up.
It’s clear to me now how Oracle keeps consultants employed…