diff --git a/tools/Makefile b/tools/Makefile
index 1382b05..2881a7c 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -129,6 +129,14 @@
 ifneq ($(CONFIG_MX23)$(CONFIG_MX28)$(CONFIG_FIT_SIGNATURE),)
 HOSTLOADLIBES_mkimage += \
 	$(shell pkg-config --libs libssl libcrypto 2> /dev/null || echo "-lssl -lcrypto")
+
+# OS X deprecate openssl in favour of CommonCrypto, supress deprecation
+# warnings on those systems
+ifeq ($(HOSTOS),darwin)
+HOSTCFLAGS_mxsimage.o += -Wno-deprecated-declarations
+HOSTCFLAGS_image-sig.o += -Wno-deprecated-declarations
+HOSTCFLAGS_rsa-sign.o += -Wno-deprecated-declarations
+endif
 endif
 
 HOSTLOADLIBES_dumpimage := $(HOSTLOADLIBES_mkimage)