For some reason I can't get ruby 2.3.0 installed via RBENV. I got it to work with RVM though. Let me know if I need to provide further information.
Here's the error I get:
Downloading ruby-2.3.0.tar.bz2...
-> https://cache.ruby-lang.org/pub/ruby/2.3/ruby-2.3.0.tar.bz2
Installing ruby-2.3.0...
BUILD FAILED (OS X 10.10.5 using ruby-build 20160426)
Inspect or clean up the working tree at /tmp/ruby-build.20160426211028.6622
Results logged to /tmp/ruby-build.20160426211028.6622.log
Last 10 log lines:
config.guess already exists
config.sub already exists
checking build system type... x86_64-apple-darwin14.5.0
checking host system type... x86_64-apple-darwin14.5.0
checking target system type... x86_64-apple-darwin14.5.0
checking whether the C compiler works... no
configure: error: in `/tmp/ruby-build.20160426211028.6622/ruby-2.3.0':
configure: error: C compiler cannot create executables
See `config.log' for more details
make: *** No targets specified and no makefile found. Stop.
your system has too strict security policy, so add sudo for the rbenv to give the ability to add executions. So you will like something like:
sudo rbenv install 2.3.0