diff --git a/configure b/configure
index a8df8d44f..b3dd6332f 100755
--- a/configure
+++ b/configure
@@ -9221,7 +9221,7 @@ printf '%s\n' "$as_me: === configuring in $ac_dir ($mp_popdir/$ac_dir)" >&6;}
 			# Compile a list of keys that have been given to the MP_CONFIG_SUBDIR
 			# macro; we want to skip copying those parameters from the original
 			# configure invocation.
-			for mp_arg in --prefix=${macports_libexec_dir} --enable-threads; do
+			for mp_arg in --prefix=${macports_libexec_dir} --disable-corefoundation; do
 				case $mp_arg in
 					--*=* | -*=*)
 							mp_arg_key=$(printf '%s\n' "$mp_arg" | sed -E 's/^--?([^=]+)=.*$/\1/')
diff --git a/configure.ac b/configure.ac
index 1b1840692..c36982330 100644
--- a/configure.ac
+++ b/configure.ac
@@ -492,7 +492,7 @@ fi
 AC_SUBST(CLONEBIN_PATH)
 
 ## Tcl package
-MP_CONFIG_SUBDIR([vendor/tcl/unix], [--prefix=${macports_libexec_dir} --enable-threads])
+MP_CONFIG_SUBDIR([vendor/tcl/unix], [--prefix=${macports_libexec_dir} --disable-corefoundation])
 VENDOR_TCL_SUBDIR=tcl/unix
 VENDOR_TCL_INSTALL="install-binaries install-headers install-libraries install-msgs install-packages"
 AC_SUBST(VENDOR_TCL_SUBDIR)
diff --git a/vendor/tcl9.0.3/unix/configure b/vendor/tcl9.0.3/unix/configure
index 10e9296fc..1786e1fb9 100755
--- a/vendor/tcl9.0.3/unix/configure
+++ b/vendor/tcl9.0.3/unix/configure
@@ -9524,7 +9524,7 @@ printf "%s\n" "#define HAVE_EVENTFD 1" >>confdefs.h
 fi
 
 done;;
-  xDragonFlyBSD|xFreeBSD|xNetBSD|xOpenBSD)
+  xDragonFlyBSD|xFreeBSD|xNetBSD|xOpenBSD|xDarwin)
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: kqueue(2)" >&5
 printf "%s\n" "kqueue(2)" >&6; }
 	# Messy because we want to check if *all* the headers are present, and not