Essa semana vi um twitt do Pellegrino comentando da dor de cabeça pra instalar o RMagick. O Kung inclusive sugeriu usar o ImageScience, que eu nunca usei, mas deve ser uma alternativa interessante.
Mas sendo mais prático preguiçoso, sempre existe uma forma mais fácil e menos dolorosa de fazer as coisas. E foi então que achei o rmagick-osx-installer. Basta fazer download, descompactar e executar
ruby rm_install.rb
E depois de todo processo completo (com um pouco de sorte), você verá um lindo resumo como esse:
Summary: There were 0 failures
libpng 1.2.26 was already installed.
libjpeg was installed successfully
ghostscript was installed successfully
ghostscript-fonts-std was installed successfully
FreeType 9.17.3 was already installed.
libwmf was installed successfully
ImageMagick was installed successfully
RMagick was installed successfully
Removing rm_install_tmp directory...Done
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