I recently upgraded my Mac to High Sierra
After the upgrade, Macvim (mvim) stopped working because (I assume) HighSierra upgraded ruby to 2.3, and mvim
This worked for me:
$ brew update
$ brew upgrade macvim
actual command output:
[bin]$ brew upgrade macvim
==> Upgrading 1 outdated package, with result:
macvim 8.0-142
==> Upgrading macvim --with-override-system-vim
==> Downloading https://github.com/macvim-dev/macvim/archive/snapshot-142.tar.gz
==> Downloading from https://codeload.github.com/macvim-dev/macvim/tar.gz/snapshot-142
######################################################################## 100,0%
==> ./configure --with-features=huge --enable-multibyte --with-macarchs=x86_64 --enable-perlinterp --enable-rubyinterp --enable-tclinterp --enable-ter
==> make