Can I use RMagick?
A simple question, with the answer simply laid out for you.
RMagick is necessary for a lot of Ruby packages, so the restrictions on using it are critical (and very annoying). Here are the constraints on what can be used where:
| Ruby 1.8 | RMagick 1 | RMagick 1 |
| Ruby 1.9 | RMagick 2 |
Or to put it another way: if you have Ruby 1.9+, you must use RMagick 2 and must have ImageMagick 6.35+. No exceptions.