To do this we have to run the following command gem update system.
Rvm install ruby version 2 3.
Ruby 2 2 2 removing rubies ruby 2 2 2.
Rvm install 2 6 1 rvm use 2 6 1 default.
Rvm default ruby v ruby 2 1 1p76 2014 02 24 revision 45161 x86 64 darwin12 0 to show what ruby is currently the selected default if any do.
Then install the specific version of ruby that you need through rvm where ruby version can be typed as ruby 2 4 0 for instance or just 2 4 0.
We are using rvm which stands for ruby version manager.
Curl ssl https get rvm io bash s stable ruby.
Rvm use system ruby v ruby 2 0 0p451 2014 02 24 revision 45167 universal x86 64 darwin13 to switch at any time to the ruby you have selected as default.
Ruby 2 3 3 provides substantial performance and reliability improvements include frozen string literal pragma safe navigation operator and many others while maintaining source level backward compatibility with ruby.
To do this we will use the ruby version manager you installed when you did your original system install.
We need to upgrade our entire version of rubygems.
I ran rvm v and it returned rvm 1 29 1 so i ran rvm install 2 2 2 to upgrade the ruby version.
Rvm list we can switch between the ruby versions by typing.
Install rvm development version.
To upgrade from ruby 2 3 to 2 6 first you ll need to upgrade your version of ruby.
Additionally with rails poor man s railsinstaller.
If you need a different newer version of rvm after installing base version of rvm check the upgrading section.
Install rvm stable with ruby.
Searching for binary rubies this might take some time.
After the installation we can list the available ruby versions we have installed by typing.
Rvm ruby version manager rvm allows you to install and manage multiple installations of ruby on your system.
It can also manage different gemsets.
Depending on your operating system the above command may use precompiled binaries or compile the ruby binaries from source.
Curl ssl https get rvm io bash.
Both tools are available for macos linux or other unix like operating systems.