问题
I'm trying to run a Ruby on Rails project which has the version 2.4.1and my system is 2.6.x.
What I did was install via Rbenv the old version of Ruby then I did the following commands:
rbenv global 2.4.1 -> to change global Ruby version
ruby -v
ruby 2.6.5p114
rbenv global
2.4.1
So there is something wrong as I would like to use 2.4.1 but seems not working that. I'm unable to start the bundle as it is saying I don't have 2.4.1 installed.
I need a solution to Mac OS Catalina as I did as I found online but nothing works and cannot be started the project.
回答1:
Try eval "$(rbenv init -)". If that solves your problem, add that line to your .bash_profile or ~/.zshrc (Credits to @Agney, see comment below)
回答2:
It's likely Catalina's switch from bash to zsh that's causing the problem:
https://programmingzen.com/installing-rbenv-on-zsh-on-macos/
Thankfully, it's pretty simple to go back to bash:
https://www.howtogeek.com/444596/how-to-change-the-default-shell-to-bash-in-macos-catalina/
回答3:
Don't use a global versioning.
Instead, put a file named .ruby-version at the root of your Rails project, with a single line content 2.4.1.
echo "2.4.1" > /your/rails/project/.ruby-version
It will tell rbenv to use this ruby version when current directory is your project directory.
来源：https://stackoverflow.com/questions/58790425/why-rbenv-does-not-work-on-mac-os-catalina