GUI is also UNX for Mac, to check for Mac use either OS→MACOSX or GUIBASE→aqua

connectivity/source/drivers/postgresql/makefile.mk

@@ -91,16 +91,9 @@ LIBPQ_DEP_LIBS+=\
 .ENDIF
 .ELSE
 LIBPQ_LINK=$(OUTDIR)/lib/libpq.a
-.IF "$(GUI)"=="MAC"
-LIBPQ_DEP_LIBS += -Wl,-dead_strip_dylibs
-.ELSE
-LIBPQ_DEP_LIBS += -Wl,--as-needed
-.ENDIF
+LIBPQ_DEP_LIBS+=$(eq,$(OS),MACOSX -Wl,-dead_strip_dylibs -Wl,--as-needed)
 .INCLUDE : $(OUTDIR_FOR_BUILD)/inc/postgresql/libpq-flags.mk
-.IF "$(GUI)"=="MAC"
-.ELSE
-LIBPQ_DEP_LIBS += -Wl,--no-as-needed
-.ENDIF
+LIBPQ_DEP_LIBS+=$(eq,$(OS),MACOSX $(NULL) -Wl,--no-as-needed)
 .ENDIF
 POSTGRESQL_INC=-I$(OUTDIR)/inc/postgresql
 POSTGRESQL_LIB=

cppuhelper/test/bootstrap/makefile.mk

@@ -37,7 +37,7 @@ USE_DEFFILE        := TRUE
 .INCLUDE :  settings.mk
 
 
-.IF "$(GUI)"=="UNX" || "$(GUI)"=="MAC"
+.IF "$(GUI)"=="UNX"
 PURPENVHELPERLIB := -luno_purpenvhelper$(COMID)
 
 .ELSE

lingucomponent/source/languageguessing/makefile.mk

@@ -39,19 +39,19 @@ VISIBILITY_HIDDEN=TRUE
 
 # --- Files --------------------------------------------------------
 
-.IF "$(GUI)"=="UNX" || "$(GUI)"=="MAC"
+.IF "$(GUI)"=="UNX"
 .IF "$(SYSTEM_LIBEXTTEXTCAT)" == "YES"
 LIBTEXTCATLIB=$(LIBEXTTEXTCAT_LIBS)
 .ELSE
 LIBTEXTCATLIB=-lexttextcat
 .ENDIF
-.ELSE               # "$(GUI)"=="UNX" || "$(GUI)"=="MAC"
+.ELSE               # "$(GUI)"=="UNX"
 .IF "$(COM)"=="GCC"
 LIBTEXTCATLIB=-lilibexttextcat
 .ELSE
 LIBTEXTCATLIB=ilibexttextcat.lib
 .ENDIF
-.ENDIF  # "$(GUI)"=="UNX" || "$(GUI)"=="MAC"
+.ENDIF  # "$(GUI)"=="UNX"
 
 SLOFILES = \
         $(SLO)$/altstrfunc.obj \