--- ./signal.c.orig	2015-11-23 16:17:11.000000000 -0800
+++ ./signal.c	2020-08-27 15:24:31.000000000 -0700
@@ -760,7 +760,7 @@ NORETURN(void ruby_thread_stack_overflow
 # elif !(defined(HAVE_UCONTEXT_H) && (defined __i386__ || defined __x86_64__ || defined __amd64__))
 # elif defined __linux__
 #   define USE_UCONTEXT_REG 1
-# elif defined __APPLE__
+# elif defined(__APPLE__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 1050
 #   define USE_UCONTEXT_REG 1
 # elif defined __FreeBSD__
 #   define USE_UCONTEXT_REG 1
--- ./vm_dump.c.orig	2018-03-18 07:27:12.000000000 -0700
+++ ./vm_dump.c	2020-08-27 15:24:31.000000000 -0700
@@ -919,7 +919,7 @@ rb_dump_machine_register(const ucontext_
 	dump_machine_register(SS);
 #   endif
     }
-# elif defined __APPLE__
+# elif defined(__APPLE__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 1050
     {
 	const mcontext_t mctx = ctx->uc_mcontext;
 #   if defined __x86_64__
