diff --git a/Installation/config/support/S45-APPLEVECLIB b/Installation/config/support/S45-APPLEVECLIB
index c2c713d6f18..4a7b6b922af 100644
--- a/Installation/config/support/S45-APPLEVECLIB
+++ b/Installation/config/support/S45-APPLEVECLIB
@@ -7,8 +7,8 @@ PROVIDES = BLAS LAPACK
 CXXFLAGS = -DCGAL_USE_F2C
 LDFLAGS =  -framework vecLib
 LIBS =
-REQUIRES =
-INCOMPATIBLE = DOLLAR_WINDOWS_COMPILER
+REQUIRES = DOLLAR_DARWIN_COMPILER
+INCOMPATIBLE = 
 STDINCLDIRS =
 INCLTHING =
 STDLIBDIRS =
diff --git a/Installation/config/support/S46a-SUNPERFORMANCECC b/Installation/config/support/S46a-SUNPERFORMANCECC
index b826dd72a79..8a63a1b229a 100644
--- a/Installation/config/support/S46a-SUNPERFORMANCECC
+++ b/Installation/config/support/S46a-SUNPERFORMANCECC
@@ -8,8 +8,8 @@ PROVIDES = BLAS LAPACK
 CXXFLAGS = -DCGAL_USE_F2C
 LDFLAGS = -library=sunperf
 LIBS =
-REQUIRES =
-INCOMPATIBLE = DOLLAR_WINDOWS_COMPILER
+REQUIRES = DOLLAR_SUNCC_COMPILER
+INCOMPATIBLE = 
 STDINCLDIRS =
 INCLTHING =
 STDLIBDIRS =
diff --git a/Installation/config/support/S47-SGICOMPLIB b/Installation/config/support/S47-SGICOMPLIB
index 649ef6498af..bbc6009e60b 100644
--- a/Installation/config/support/S47-SGICOMPLIB
+++ b/Installation/config/support/S47-SGICOMPLIB
@@ -8,7 +8,7 @@ CXXFLAGS =
 LDFLAGS =
 LIBS = complib.sgimath_mp c
 REQUIRES =
-INCOMPATIBLE = DOLLAR_WINDOWS_COMPILER
+INCOMPATIBLE = DOLLAR_WINDOWS_COMPILER DOLLAR_DARWIN_COMPILER
 STDINCLDIRS =
 INCLTHING =
 STDLIBDIRS =
diff --git a/Installation/config/support/S96-TAUCSDARWIN b/Installation/config/support/S96-TAUCSDARWIN
index f5187697f3a..0b25452bebe 100644
--- a/Installation/config/support/S96-TAUCSDARWIN
+++ b/Installation/config/support/S96-TAUCSDARWIN
@@ -6,8 +6,8 @@ PROVIDES = TAUCS
 CXXFLAGS =
 LDFLAGS =
 LIBS = taucs metis crypto
-REQUIRES = BLAS
-INCOMPATIBLE = DOLLAR_WINDOWS_COMPILER
+REQUIRES = BLAS DOLLAR_DARWIN_COMPILER
+INCOMPATIBLE = 
 STDINCLDIRS =
 INCLTHING =
 STDLIBDIRS =
diff --git a/Installation/install_cgal b/Installation/install_cgal
index 0812e1eaf00..74d8410630c 100755
--- a/Installation/install_cgal
+++ b/Installation/install_cgal
@@ -840,6 +840,8 @@ set_compiler_flags()
     PRINT_STACKTRACE_PROGRAM="gdb"
     WINDOWS_COMPILER=""
     CYGWIN_COMPILER=""
+    DARWIN_COMPILER=""
+    SUNCC_COMPILER=""
     SUFFIX_LIST=
     OBJ_EXT=".o"
     OBJ_OPT="-c"
@@ -965,6 +967,7 @@ set_compiler_flags()
 	    ;;
 	*SunOS*5.*CC*)
 	    #### settings for sunpro compiler on solaris
+	    SUNCC_COMPILER="y"
 	    ADDITIONAL_CXXFLAGS="-features=extensions -D_RWSTD_ALLOCATOR"
 	    CGAL_STATIC_LIB_CREATE="\$(CGAL_CXX) -xar -o ''"
 	    CGAL_SHARED_LIB_CXXFLAGS="-PIC"
@@ -1042,6 +1045,7 @@ set_compiler_flags()
 	    ;;
 	*Darwin*g++*)
 	    #### settings for gcc on Darwin (MacOSX)
+	    DARWIN_COMPILER="y"
 	    ADDITIONAL_CXXFLAGS="-Wall"
 	    CGAL_SHARED_LIB_CXXFLAGS="-fno-common"
 	    CGAL_SHARED_LIB_CREATE="\$(CGAL_CXX) -dynamiclib"