Trying to install Rails 6 using RVM

Question

I have installed RVM successfully on my Mac and using it I have installed Ruby 2.6.3. I have set my current and default version of Ruby to be 2.6.3. Everything seems to be fine because when I enter ruby -v into the terminal it tells me I'm using ruby 2.6.3.

My problem comes when I try to install Rails 6, I'm entering:

gem install rails --version=6.0.0 -no-ri -no-rdoc

It seems to install correctly however when I try to confirm with:

rails -v

I get:

Rails 6 requires Ruby 2.5.0 or newer.

You're running
  ruby 2.3.7p456 (2018-03-28 revision 63024) [universal.x86_64-       darwin18]

Please upgrade to Ruby 2.5.0 or newer to continue.

Why am I getting this message when my ruby -v command is telling me that I am using ruby 2.6.3

Any help would be very welcome.

Answer 1

You're running ruby 2.3.7p456 . You need to set your local ruby version to 2.6.3 .

Try which ruby to see which ruby version is loaded.

rvm install 2.6.3
rvm use 2.6.3

You can then see which ruby is running with which ruby .

See the basics on the rvm docs

As an aside, I also recommend recommend rbenv over rvm; however, you can only have one installed. If you have both installed, you're going to have a bad time.

To make sure you do not have both installed try which rbenv , and that should return rbenv not found

Please edit your original question with the output of the following commands:

1. which -a ruby
2. echo $PATH (That will help debug if your $PATH is set up incorrectly.)
3. which rbenv
4. ls (in your project directory)

Answer 2

i also had the similar problem which i resolved by uninstalling rvm completely and then installing rbenv.