问题
I need to update rubygems from 1.3.5 to 1.4.2 but apparently rubygems update just updates you to the latest version
How can I update to 1.4.2?
回答1:
You can install specific versions of RubyGems using RVM.
rvm rubygems 1.4.2
回答2:
After some research this worked for me:
gem install -v 1.4.2 rubygems-update && ruby `gem env gemdir`/gems/rubygems-update-1.4.2/setup.rb
If you need to use sudo to install gems then make sure to put a sudo in both calls:
sudo gem install -v 1.4.2 rubygems-update && sudo ruby `gem env gemdir`/gems/rubygems-update-1.4.2/setup.rb
来源：https://stackoverflow.com/questions/5393509/updating-rubygems-to-specific-version-on-mac