diff --git a/Makefile b/Makefile
index 6f7d230320..63b26a5a93 100644
--- a/Makefile
+++ b/Makefile
@@ -412,6 +412,9 @@ win32-just-cs:
 
 both:
 	$(MAKE) in-place
+	$(MAKE) also-cs
+
+also-cs:
 	$(MAKE) cs CS_SETUP_TARGET=in-place-setup PLT_SETUP_OPTIONS="-D $(PLT_SETUP_OPTIONS)"
 
 # ------------------------------------------------------------
diff --git a/racket/src/cs/c/Makefile.in b/racket/src/cs/c/Makefile.in
index 271fc855d9..829e6c8589 100644
--- a/racket/src/cs/c/Makefile.in
+++ b/racket/src/cs/c/Makefile.in
@@ -284,6 +284,7 @@ macos-install:
 	$(MAKE) common-install
 	rm -f $(DESTDIR)$(RKTFWDEST)/Racket
 	rm -rf $(DESTDIR)$(RKTFWDEST)/Versions/$(FWVERSION)_CS
+	if [ @FRAMEWORK_REL_INSTALL@ = yes ] ; then $(RACKET) -cu "$(srcdir)/../../mac/clean-fw.rkt" $(DESTDIR)$(RKTFWDEST) ; fi
 	mkdir -p $(DESTDIR)"$(RKTFWDEST)/Versions/$(FWVERSION)_CS"
 	cp $(RKTFW) $(DESTDIR)$(RKTFWDEST)/Versions/$(FWVERSION)_CS/
 	mkdir -p $(DESTDIR)"$(RKTFWDEST)/Versions/$(FWVERSION)_CS/boot"
diff --git a/racket/src/cs/c/configure b/racket/src/cs/c/configure
index 795853c963..802e24d788 100755
--- a/racket/src/cs/c/configure
+++ b/racket/src/cs/c/configure
@@ -625,6 +625,7 @@ LIBOBJS
 CROSS_COMPILE_TARGET_KIND
 CS_COMPILED_SUBDIR
 CS_INSTALLED
+FRAMEWORK_REL_INSTALL
 FRAMEWORK_PREFIX
 FRAMEWORK_INSTALL_DIR
 SCHEME_CONFIG_ARGS
@@ -4668,6 +4669,7 @@ CPPFLAGS="$CPPFLAGS $PREFLAGS"
 
 
 
+
 
 
 makefiles="Makefile"
diff --git a/racket/src/cs/c/configure.ac b/racket/src/cs/c/configure.ac
index 45bdbc4a0c..d9abc14970 100644
--- a/racket/src/cs/c/configure.ac
+++ b/racket/src/cs/c/configure.ac
@@ -466,6 +466,7 @@ AC_SUBST(MAKE_BUILD_SCHEME)
 AC_SUBST(SCHEME_CONFIG_ARGS)
 AC_SUBST(FRAMEWORK_INSTALL_DIR)
 AC_SUBST(FRAMEWORK_PREFIX)
+AC_SUBST(FRAMEWORK_REL_INSTALL)
 AC_SUBST(CS_INSTALLED)
 AC_SUBST(CS_COMPILED_SUBDIR)
 AC_SUBST(CROSS_COMPILE_TARGET_KIND)
diff --git a/racket/src/mac/clean-fw.rkt b/racket/src/mac/clean-fw.rkt
new file mode 100644
index 0000000000..f6a8b44069
--- /dev/null
+++ b/racket/src/mac/clean-fw.rkt
@@ -0,0 +1,49 @@
+
+;; Used by Mac OS install to clear out old frameworks versions,
+;; leaving other variants for the current version intact.
+
+;; written in #%kernel because it's loaded with -c (ie, no compiled files)
+
+(module collects-path '#%kernel
+  (let-values ([(fw-dir) (vector-ref (current-command-line-arguments) 0)])
+    (let-values ([(versions-dir) (build-path fw-dir "Versions")])
+      (letrec-values ([(clean-files)
+                       (lambda (l)
+                         (if (null? l)
+                             (void)
+                             (if (starts-this-version? (path->string (car l)))
+                                 (clean-files (cdr l))
+                                 (begin
+                                   (delete-all versions-dir (car l))
+                                   (clean-files (cdr l))))))]
+                      [(delete-all)
+                       (lambda (base p)
+                         (let-values ([(p) (build-path base p)])
+                           (if (file-exists? p)
+                               (delete-file p)
+                               (if (directory-exists? p)
+                                   (begin
+                                     (delete-all* p (directory-list p))
+                                     (delete-directory p))
+                                   (void)))))]
+                      [(delete-all*)
+                       (lambda (base l)
+                         (if (null? l)
+                             (void)
+                             (begin
+                               (delete-all base (car l))
+                               (delete-all* base (cdr l)))))]
+                      [(starts-this-version?)
+                       (lambda (s)
+                         (let-values ([(len) (string-length (version))]
+                                      [(s-len) (string-length s)])
+                           (if (s-len . >= . len)
+                               (if (equal? (version) (substring s 0 len))
+                                   (if (= s-len len)
+                                       #t
+                                       (if (equal? #\_ (string-ref s len))
+                                           #t
+                                           #f))
+                                   #f)
+                               #f)))])
+        (clean-files (directory-list versions-dir))))))
diff --git a/racket/src/racket/Makefile.in b/racket/src/racket/Makefile.in
index 22eb92be9a..68421b58e9 100644
--- a/racket/src/racket/Makefile.in
+++ b/racket/src/racket/Makefile.in
@@ -513,7 +513,7 @@ osx-install:
 	rm -f $(DESTDIR)$(MZFWDIR)/Racket
 	rm -rf $(DESTDIR)$(MZFWDIR)/Versions/$(FWVERSION)
 	rm -rf $(DESTDIR)$(MZFWDIR)/Versions/$(FWVERSION)_3m
-	if [ @FRAMEWORK_REL_INSTALL@ = yes ] ; then rm -rf $(DESTDIR)$(MZFWDIR) ; fi
+	if [ @FRAMEWORK_REL_INSTALL@ = yes ] ; then @RUN_RACKET_CGC@ -cu "$(srcdir)/../mac/clean-fw.rkt" $(DESTDIR)$(MZFWDIR) ; fi
 	mkdir -p $(DESTDIR)@FRAMEWORK_INSTALL_DIR@
 
 osx-install-cgc: