diff --git a/applications/utilities/mesh/generation/foamyMesh/conformalVoronoiMesh/conformalVoronoiMesh/CGALTriangulation3DKernel.H b/applications/utilities/mesh/generation/foamyMesh/conformalVoronoiMesh/conformalVoronoiMesh/CGALTriangulation3DKernel.H
index 2795dff15b..107aef1a4c 100644
--- a/applications/utilities/mesh/generation/foamyMesh/conformalVoronoiMesh/conformalVoronoiMesh/CGALTriangulation3DKernel.H
+++ b/applications/utilities/mesh/generation/foamyMesh/conformalVoronoiMesh/conformalVoronoiMesh/CGALTriangulation3DKernel.H
@@ -30,8 +30,8 @@ Description
 
 \*---------------------------------------------------------------------------*/
 
-#ifndef CGALTriangulation3DKernel_H
-#define CGALTriangulation3DKernel_H
+#ifndef Foam_CGALTriangulation3DKernel_H
+#define Foam_CGALTriangulation3DKernel_H
 
 // Silence boost bind deprecation warnings (before CGAL-5.2.1)
 #include "CGAL/version.h"
@@ -54,9 +54,19 @@ Description
 //    #include "CGAL/Robust_circumcenter_traits_3.h"
 //    typedef CGAL::Robust_circumcenter_traits_3<baseK>           K;
 
+#if defined(CGAL_VERSION_NR) && (CGAL_VERSION_NR < 1050500000)
+    // Prior to CGAL-5.5
+
     #include "CGAL/Robust_circumcenter_filtered_traits_3.h"
     typedef CGAL::Robust_circumcenter_filtered_traits_3<baseK>  K;
 
+#else
+
+    #include "CGAL/Robust_weighted_circumcenter_filtered_traits_3.h"
+    typedef CGAL::Robust_weighted_circumcenter_filtered_traits_3<baseK> K;
+
+#endif
+
 #else
 
     // Very robust but expensive kernel
diff --git a/applications/utilities/preProcessing/viewFactorsGen/Make/options b/applications/utilities/preProcessing/viewFactorsGen/Make/options
index 08e64c8a7d..cc5cbf8c6b 100644
--- a/applications/utilities/preProcessing/viewFactorsGen/Make/options
+++ b/applications/utilities/preProcessing/viewFactorsGen/Make/options
@@ -4,7 +4,6 @@ EXE_INC = \
     -Wno-old-style-cast \
     $(COMP_FLAGS) \
     ${CGAL_INC} \
-    -DCGAL_HEADER_ONLY \
     -I$(LIB_SRC)/finiteVolume/lnInclude \
     -I$(LIB_SRC)/surfMesh/lnInclude \
     -I$(LIB_SRC)/meshTools/lnInclude \
@@ -12,7 +11,6 @@ EXE_INC = \
 
 
 EXE_LIBS = \
-    /* ${CGAL_LIBS} */ \
     -lfiniteVolume \
     -lsurfMesh \
     -lmeshTools \
diff --git a/wmake/rules/General/cgal b/wmake/rules/General/cgal
index 7442d4071e..e147b8e0b1 100644
--- a/wmake/rules/General/cgal
+++ b/wmake/rules/General/cgal
@@ -1,21 +1,26 @@
 # ----------------------------------------------------------------------------
 # CGAL definitions - several possibilities
 #
-#  0. missing
-#  1. header-only
-#  2. library, no mpfr
-#  3. library, with mpfr (a likely default)
+#  - missing
+#  - header-only
+#  - header-only, no mpfr
+#  - library, no mpfr
+#  - library, with mpfr (default for older CGAL)
 #
 # Dispatch according to the defined 'CGAL_FLAVOUR'
 # - names may change [see wmake/scripts/have_cgal]
-# (no-cgal | cgal-header | cgal-no-mpfr | cgal-mpfr)
+# (no-cgal | cgal-header | cgal-header-no-mpfr | cgal-no-mpfr | cgal-mpfr)
 
 cgal_subrule := cgal-mpfr
-ifneq (,$(findstring header,$(CGAL_FLAVOUR)))
-    cgal_subrule := cgal-header-only
-endif
 ifneq (,$(findstring no-mpfr,$(CGAL_FLAVOUR)))
     cgal_subrule := cgal-no-mpfr
+    ifneq (,$(findstring header,$(CGAL_FLAVOUR)))
+        cgal_subrule := cgal-header-no-mpfr
+    endif
+else
+    ifneq (,$(findstring header,$(CGAL_FLAVOUR)))
+        cgal_subrule := cgal-header-only
+    endif
 endif
 
 # ----------------------------------------------------------------------------
diff --git a/wmake/rules/General/cgal-header-no-mpfr b/wmake/rules/General/cgal-header-no-mpfr
new file mode 100644
index 0000000000..a2e7cf01c8
--- /dev/null
+++ b/wmake/rules/General/cgal-header-no-mpfr
@@ -0,0 +1,18 @@
+# -----------------------------------------------------------------------------
+# CGAL (header-only version) without mpfr
+
+CGAL_INC  = -DCGAL_HEADER_ONLY
+CGAL_LIBS =
+
+CGAL_INC  += \
+    $(foreach dir,$(BOOST_INC_DIR),-I$(dir)) \
+    $(foreach dir,$(CGAL_INC_DIR),-I$(dir))
+
+CGAL_LIBS += \
+    $(foreach dir,$(BOOST_LIB_DIR),-L$(dir))
+
+# ----
+# Extra failsafe - still needed? (2020-05-15)
+## CGAL_INC  += -I/usr/local/include -I/usr/include
+
+# -----------------------------------------------------------------------------
diff --git a/wmake/rules/darwin64Clang/cgal b/wmake/rules/darwin64Clang/cgal
deleted file mode 100644
index b04e6b0c68..0000000000
--- a/wmake/rules/darwin64Clang/cgal
+++ /dev/null
@@ -1,14 +0,0 @@
-# ----------------------------------------------------------------------------
-# CGAL on Darwin
-# CGAL (library version) without mpfr
-
-CGAL_INC  = \
-    $(foreach dir,$(BOOST_INC_DIR),-I$(dir)) \
-    $(foreach dir,$(CGAL_INC_DIR),-I$(dir))
-
-CGAL_LIBS = \
-    $(foreach dir,$(BOOST_LIB_DIR),-L$(dir)) \
-    $(foreach dir,$(CGAL_LIB_DIR),-L$(dir)) \
-    -lCGAL
-
-# ----------------------------------------------------------------------------