Rails 3.2.6

~$ rvm install 1.9.3-head

No bison!

~$ rvm requirements

I was on XCode 3 (from Snow Leopard) – Need minimum 4.1 for Lion – NO 4.3!

XCode 4.3.3 from App Store June 12, 2012
XCode Command Line Tools (Pref->Downloads)

rvm says DOWNGRADE XCode 4.3! (If problems)

~$ rvm install 1.9.3-head

No autoreconf!

install homebrew (because of autoconf)
brew install automake

~$ rvm install 1.9.3-head – worked!

rvm use 1.9.3-head –default

gem install rails

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