ImageMagick 7 with RMagick 2.16 on MacOS Sierra Can't find MagickWand.h
I have just encountered and solved this issue on a new Mac running Sierra. There seems to be no solution for ImageMagick 7 at this time.
Uninstall existing imagemagick if needed
Install version 6:
brew install imagemagick@6Since this is keg-only, you should then force-link it:
brew link --force imagemagick@6
This installed imagemagick version 6.9.7-4 for me.
Afterwards, the gem then installed successfully. I am including the version numbers for future readers:
Installing rmagick 2.13.4 with native extensions
dyson's solution didn't quite work for me. I found that in addition to installing imagemagick@6, I also need to install pkg-config and then set PKG_CONFIG_PATH.
brew install imagemagick@6 pkg-configPATH="/usr/local/opt/imagemagick@6/bin:$PATH" PKG_CONFIG_PATH=/usr/local/opt/imagemagick@6/lib/pkgconfig gem install rmagick -v '2.13.4'