Questions and postings pertaining to the usage of ImageMagick regardless of the interface. This includes the command-line utilities, as well as the C and C++ APIs. Usage questions are like "How do I use ImageMagick to create drop shadows?".
I'm getting the same thing on my Lion machine (straight up Lion, not Mountain Lion). I rebooted to see if it would fix things, and it did actually make the "Illegal Instruction 4" error go away, but now I'm getting a "Segmentation Fault: 11" error instead. This is happening with convert, mogrify, and apparently every other binary as well. So basically, I can't use imagemagick.
I am on Snow Leopard and have no problems. I installed all my delegates from MacPorts, but install IM manually from source so I can keep up with the latest version of IM. I have never encountered that problem, but am not using the binary.
Howdy. I've had the issue with 'Illegal Instruction 4' on a personal project. I'm on Lion and have recently upgraded to Xcode 4.4.1 which brought with it SDK 10.8. Turned out i was using 'macosx' as SDKROOT, which compiled everything targeting the latest SDK (i.e. 10.8 ).
Forcing the project to use 10.7 SDK solved this issue for me.
Hope that helps.