Add client support for LED state sync
diff --git a/vncviewer/CMakeLists.txt b/vncviewer/CMakeLists.txt
index 2aecda2..56313e9 100644
--- a/vncviewer/CMakeLists.txt
+++ b/vncviewer/CMakeLists.txt
@@ -53,7 +53,9 @@
 endif()
 
 if(APPLE)
-  target_link_libraries(vncviewer "-framework Cocoa" "-framework Carbon")
+  target_link_libraries(vncviewer "-framework Cocoa")
+  target_link_libraries(vncviewer "-framework Carbon")
+  target_link_libraries(vncviewer "-framework IOKit")
 endif()
 
 install(TARGETS vncviewer DESTINATION ${BIN_DIR})