As of the latest master, you can now cross-compile from Linux to OS-X using ENIGMA. Wiki guide here:
http://enigma-dev.org/docs/Wiki/CrossCompileLinuxOSX
This should go without saying, but make sure you are aware of Apple's draconian policies before submitting a cross-compiled app to the App Store (it will likely be rejected). You can certainly distribute the app unofficially, of course (like on the "Games" page).
As always, I am happy to answer questions/fix bugs as people run into them.
This is some nice work sorlok! These cross compilers are very very important especially when considering indie developers who can't afford multiple development machines.