I have just installed rubymine 5.4.3.2.1 and am trying to start an example project. The problem i am having is that rubymine is asking for a SDK. So where do i point it to?
You should point it to the where you keep your Ruby Binary File, for example:
- Windows -
d:\dev\Ruby19\bin\ruby.exe
- Mac Brew -
/usr/local/Cellar/ruby/2.0.0-p247/bin/ruby
- Ruby Version Manager -
/Users/<user>/.rvm/rubies/ruby-1.9.3-p327/bin/ruby
- Linux/Mac Default -
/usr/bin/ruby
If you are on Windows and don't have Ruby installed yet, download it from http://rubyinstaller.org/ .
After installing point RubyMine to the ruby.exe
file location.
For example, if you install using rubyinstaller-2.0.0-p247.exe
into c:\Ruby200
(the default path suggested by the installer), RubyMine would accept c:\Ruby200\bin\ruby.exe
path for the SDK (it will even detect it automatically):

Note that it's also recommended to install and configure the DevKit from the same site as it's required for many gems that have native code.
When everything is installed you can follow the Quick Start Guide for RubyMine.
Only for Mac, brew, rbenv
:
$ which ruby
/usr/local/var/rbenv/shims/ruby
But it doesn't show used gems. So, it's better to add file inside ruby version folder: /usr/local/var/rbenv/versions/*your_version*/bin/ruby
Ruby path in Rails Container: /usr/local/bin/ruby
(no RVM installed)
Local Ruby path: ~/.rvm/rubies/ruby-2.6.0/bin/ruby
(no default Ruby installed)
Local RVM path: ~/.rvm/bin/rvm
来源:https://stackoverflow.com/questions/17950288/rubymine-cant-find-sdk-where-is-it