How to update Ruby Version 2.0.0 to the latest version in Mac OSX Yosemite?

问题:

I need to update my ruby version from 2.0.0 to the latest version, I can not use some gems because my version is not updated. I had used Homebrew to install Ruby some time ago, How can i update my Ruby version?

回答1:

Open your terminal and run

\curl -sSL https://get.rvm.io | bash -s stable 

When this is complete, you need to restart your terminal for the rvm to work.

Now, run rvm list known

This shows the list of versions of the ruby.

Now, run rvm install ruby-2.4.2

If you type ruby -v in the terminal, you should see ruby 2.4.2.

If it still shows you ruby 2.0., run rvm use ruby-2.4.2 --default.

回答2:

Brew only solution

Update:

From the comments (kudos to Maksim Luzik), I haven't tested but seems like a more elegant solution:

After installing ruby through brew, run following command to update the links to the latest ruby installation: brew link --overwrite ruby

Original answer:

Late to the party, but using brew is enough. It's not necessary to install rvm and for me it just complicated things.

By brew install ruby you're actually installing the latest (currently v2.4.0). However, your path finds 2.0.0 first. To avoid this just change precedence (source). I did this by changing ~/.profile and setting:

export PATH=/usr/local/bin:$PATH

After this I found that bundler gem was still using version 2.0.0, just install it again: gem install bundler

回答3:

I recommend rbenv* https://github.com/rbenv/rbenv

* If this meets your criteria: https://github.com/rbenv/rbenv/wiki/Why-rbenv?:

rbenv does…

• Provide support for specifying application-specific Ruby versions.
• Let you change the global Ruby version on a per-user basis.
• Allow you to override the Ruby version with an environment variable.

In contrast with RVM, rbenv does not…

• Need to be loaded into your shell. Instead, rbenv's shim approach works by adding a directory to your $PATH.
• Override shell commands like cd or require prompt hacks. That's dangerous and error-prone.
• Have a configuration file. There's nothing to configure except which version of Ruby you want to use.
• Install Ruby. You can build and install Ruby yourself, or use ruby-build to automate the process.
• Manage gemsets. Bundler is a better way to manage application dependencies. If you have projects that are not yet using Bundler you can install the rbenv-gemset plugin.
• Require changes to Ruby libraries for compatibility. The simplicity of rbenv means as long as it's in your $PATH, nothing else needs to know about it.

---

INSTALLATION

Install Homebrew http://brew.sh

Then:

 $ brew update $ brew install rbenv  $ brew install rbenv ruby-build  # Add rbenv to bash so that it loads every time you open a terminal echo 'if which rbenv > /dev/null; then eval "$(rbenv init -)"; fi' >> ~/.bash_profile source ~/.bash_profile 

UPDATE
There's one additional step after brew install rbenv Run rbenv init and add one line to .bash_profile as it states. After that reopen your terminal window […] SGI Sep 30 at 12:01 ―https://stackoverflow.com/users/119770

 $ rbenv install --list Available versions:  1.8.5-p113  1.8.5-p114  […]  2.3.1  2.4.0-dev  jruby-1.5.6  […] $ rbenv install 2.3.1 […] 

Set the global version:

 $ rbenv global 2.3.1 $ ruby -v ruby 2.3.1p112 (2016-04-26 revision 54768) [x86_64-darwin15] 

Set the local version of your repo by adding .ruby-version to your repo's root dir:

 $ cd ~/whatevs/projects/new_repo $ echo "2.3.1" > .ruby-version 

For MacOS visit this link

回答4:

Open Terminal:

sudo gem update --system  

It works!

回答5:

You can specify the latest version of ruby by looking at https://www.ruby-lang.org/en/downloads/

1. Fetch the latest version:

   curl -sSL https://get.rvm.io | bash -s stable --ruby

2. Install it:

   rvm install 2.2

3. Use it as default:

   rvm use 2.2 --default

Or run the latest command from ruby:

rvm install ruby --latest rvm use 2.2 --default 

回答6:

Fast way to upgrade ruby to v2.4+

brew upgrade ruby 

回答7:

In case anyone gets the same error I did: “Requirements installation failed with status: 1.” here's what to do:

Install Homebrew (for some reason might not work automatically) with this command:

ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" 

Then proceed to install rvm again using

curl -sSL https://get.rvm.io | bash -s stable --ruby 

Quit and reopen Terminal and then:

rvm install 2.2 rvm use 2.2 --default 

回答8:

In terminal : rvm gemset use global

回答9:

Simplest way is definitely to enter the following command in the terminal:

sudo gem update --system 

You can add the flag --no-document if you do not want to download the documentation. Here is sample output after running the command:

sudo gem update --system Password: Updating rubygems-update Fetching: rubygems-update-2.6.8.gem (100%) Successfully installed rubygems-update-2.6.8 Parsing documentation for rubygems-update-2.6.8 Installing ri documentation for rubygems-update-2.6.8 Installing darkfish documentation for rubygems-update-2.6.8 Installing RubyGems 2.6.8 RubyGems 2.6.8 installed Parsing documentation for rubygems-2.6.8 Installing ri documentation for rubygems-2.6.8  ------------------------------------------------------------------------------  RubyGems installed the following executables:     /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/gem  Ruby Interactive (ri) documentation was installed. ri is kind of like man  pages for ruby libraries. You may access it like this:   ri Classname   ri Classname.class_method   ri Classname#instance_method 

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