I can't run Viking on my Mac OS X.
Viking crash when loading the GTK library embedded in the package. There is no GTK installed on the machine.
Darwin 11.1.0 Darwin Kernel Version 11.1.0: Tue Jul 26 16:09:02 PDT 2011; root:xnu-1699.22.81~1/RELEASE_I386 i386 i386
Crash Log
Please, can you share the link from where you downloaded viking for Mac OS?
I got him right here in SF. I learned about the program through an article in a Brazilian portal (http://g1.globo.com/tecnologia/noticia/2011/10/conheca-programas-gratuitos-para-criacao-de-mapas-para-gps.html) and used the link provided in the article. I downloaded the DMG direct SF (MD5 (Viking 1.2.1 - Quartz.dmg) = b06f15073a86b0dbf47a58206f6ff14b).
Unfortunately the Mac OS version is supplied 'as is', as the main developers don't use Mac systems.
I've forwarded the message on to our Mac person, who created the binary - hopefully they will be able to help.