Compile error: Maven don't know the java system type: Boolean, Integer etc: The you project it is properly out of sync with the eclipse project. Click Maven-Update Project Configuration then check Build-path - Configure build path - Java compiler check that the Enable project specific settings are check and that the Compiler compliance level = 1.5 or later and that the Use default compliance settings are check as well.

Maven project don't build on my Mac: Check the Java compiler compliance level if it is set to Java version 1.6 then you need to set is down to the latest version for mac - 1.5 then it should compile without any problems.