Hi When compiling dillo 3.0.5 on Mac OS 10.11, I get : /usr/bin/c++ -DHAVE_CONFIG_H -I. -I.. -I.. -DDILLO_SYSCONF='"/opt/local/etc/dillo/"' -DDILLO_DOCDIR='"/opt/local/share/doc/dillo/"' -I/opt/local/include -I/usr/local/include -I/opt/local/include/libpng16 -I/opt/local/include -pipe -Os -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_THREAD_SAFE -D_REENTRANT -pipe -Os -m64 -Wall -W -Wno-unused-parameter -fno-rtti -fno-exceptions -MT xembed.o -MD -MP -MF .deps/xembed.Tpo -c -o xembed.o xembed.cc mv -f .deps/dpiapi.Tpo .deps/dpiapi.Po mv -f .deps/image.Tpo .deps/image.Po mv -f .deps/imgbuf.Tpo .deps/imgbuf.Po mv -f .deps/form.Tpo .deps/form.Po mv -f .deps/findbar.Tpo .deps/findbar.Po mv -f .deps/menu.Tpo .deps/menu.Po In file included from xembed.cc:18: In file included from /opt/local/include/FL/x.H:43: /opt/local/include/FL/mac.H:104:12: fatal error: '../src/Fl_Font.H' file not found # include "../src/Fl_Font.H" It seems that dillo is trying to use X but on Mac, but fltk is using quartz. The problem has been reported on many systems. Dillo 3.0.4 was working fine. Thanks yves