Update Makefile

Author: bucanero

tools/generic/Makefile

@@ -28,7 +28,7 @@ ifneq (,$(findstring CYGWIN,$(UNAME)))
 endif
 
 ifneq (,$(findstring Darwin,$(shell uname -s)))
-	SDK	:=	/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk
+	SDK	:=	/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk
 	CFLAGS += -mmacosx-version-min=10.14 -isysroot $(SDK) -Wl,-syslibroot,$(SDK) -arch x86_64
 endif