Need help installing Ruby 2.7.2 on Mac

Question

I'm trying to install Ruby version 2.7.2 on my Mac (latest OS with all updates) and did the following

brew update
brew upgrade rbenv ruby-build

and then

rbenv install 2.7.2
ruby-build: definition not found: 2.7.2

See all available versions with `rbenv install --list'.

If the version you need is missing, try upgrading ruby-build:

  brew update && brew upgrade ruby-build

So I tried following the instructions above and get this

brew update && brew upgrade ruby-build
Already up-to-date.
Warning: ruby-build 20200926 already installed

score 35 · Accepted Answer · answered Oct 04 '20 at 01:54

35

You need to install the latest ruby-build

$ brew unlink ruby-build # remove STABLE version
$ brew install --HEAD ruby-build 
$ rbenv install -l | grep '2.7.2'
2.7.2


Only latest stable releases for each Ruby implementation are shown.
Use 'rbenv install --list-all' to show all local versions.

answered Oct 04 '20 at 01:54

Andrei Kovrov

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1

Wish I could give you more upvotes! Thanks! – Kori John Roys Dec 17 '20 at 01:05
2

This doesn't work as of 10/2021 – jdog Oct 13 '21 at 03:07
@jdog what exactly doesn't work? What `rbevn`'s version do you use? – Andrei Kovrov Oct 19 '21 at 00:21
1

this doesn't work for me either :(. On an Apple M1, `rbenv` installed via `brew`. rbenv version: 1.2.0. – papiro Oct 28 '21 at 04:04
for mac (m1 or m2 cheap) you need to add these line too: eval "$(rbenv init -)" export PATH="$HOME/.rbenv/bin:$PATH" which -a ruby – MA Deldari May 25 '23 at 02:04

score 3 · Answer 2 · answered Oct 05 '20 at 01:05

The answer from @andrei-kovrov is correct but, alternatively, you can wait until this PR gets merged:

https://github.com/Homebrew/homebrew-core/pull/62096

Btw, this answer will not age well so, for reference, this is where the formulae are staged before they get released:

https://github.com/Homebrew/homebrew-core/pulls

score 0 · Answer 3 · answered Oct 03 '20 at 22:59

It might be an issue reading the correct version of ruby based on the path that is specified. If you already have another version of ruby installed the path might not be updated to look for a newer version.

This article has a lot of really great information on how to set up ruby on a mac: https://stackify.com/install-ruby-on-your-mac-everything-you-need-to-get-going/

Need help installing Ruby 2.7.2 on Mac

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