I have already installed ruby 1.8.7 by default in my system (macos Lion). I installed rvm and then issued the following commands : rvm install 1.9.2-p290 rvm --create use 1.9.2-p290@rails3tutorial rvm --default use 1.9.2-p290@rails3tutorial The problem is that the system keeps using ruby 1.8.7 For example when I run ruby --version I get ruby 1.8.7 Any ideas? Thank you. -- Posted via http://www.ruby-forum.com/.