I don\'t manage to install therubyracer gem on Yosemite 10.10.
Here is the log:
11:53 $ gem install libv8 -v \'3.16.14.3\' -- --with-system-v8
Building
This solution worked for me following Jakub Troszok's solution above with just a minor change
gem uninstall libv8
gem install therubyracer -v '0.12.1'
Fetching: libv8-3.16.14.19-x86_64-darwin-18.gem (100%)
Successfully installed libv8-3.16.14.19-x86_64-darwin-18
Building native extensions. This could take a while...
Successfully installed therubyracer-0.12.1
Parsing documentation for libv8-3.16.14.19-x86_64-darwin-18
Installing ri documentation for libv8-3.16.14.19-x86_64-darwin-18
Parsing documentation for therubyracer-0.12.1
Installing ri documentation for therubyracer-0.12.1
Done installing documentation for libv8, therubyracer after 0 seconds
2 gems installed
gem install libv8 -v '3.16.14.17' -- --with-system-v8 (if the libv8 version required for your project is different from the one installed by rubyracer)
bundle install