routine for loading lower resolution horizont and sky for nature theme when bigger images are not supported; right now they are not installed, but they could be useful for less powerful machines in general
if (APPLE AND BUNDLE)
find_program(macdeployqt_EXE NAMES macdeployqt macdeployqt-mac)
if(NOT macdeployqt_EXE)
message(FATAL_ERROR "The utility macdeployqt is required to create the bundle!")
endif()
#dummy target, we're interested in the postscript
add_custom_target(bundle)
set_target_properties(bundle PROPERTIES POST_INSTALL_SCRIPT ${CMAKE_CURRENT_BINARY_DIR}/CreateMacBundle.cmake)
set(frameworks_dir ${bundle_name}/Contents/Frameworks/)
CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/CreateMacBundle.cmake.in ${CMAKE_CURRENT_BINARY_DIR}/CreateMacBundle.cmake)
endif()