Solution 1:
Like the error message says,
icu required (brew install icu4c or apt-get install libicu-dev)
since you're on OS X, you should run:
brew install icu4c
OS X `gollum` install not working
Solution 1:
Like the error message says,
icu required (brew install icu4c or apt-get install libicu-dev)
since you're on OS X, you should run:
brew install icu4c