Hi I managed to compile successfully on the mac Mirall changing the following package file Mirall: Pwd: /Users/leomello/Downloads/owncloud/mirall vi make/modules/FindCsync.cmake I changed the line: SET(CSYNC_LIBRARY ${CMAKE_SOURCE_DIR}/../buildcsync/src/libcsync.so) to: SET(CSYNC_LIBRARY ${CMAKE_SOURCE_DIR}/../buildcsync/src/libcsync.dylib)