merge bitcoin#29834: Change MAC_OSX macro to __APPLE__ in crypto

Author: kwvg

src/crypto/sha256.cpp

@@ -16,7 +16,7 @@
 #include <asm/hwcap.h>
 #endif
 
-#if defined(MAC_OSX) && defined(ENABLE_ARM_SHANI)
+#if defined(__APPLE__) && defined(ENABLE_ARM_SHANI)
 #include <sys/types.h>
 #include <sys/sysctl.h>
 #endif
@@ -666,7 +666,7 @@ std::string SHA256AutoDetect(sha256_implementation::UseImplementation use_implem
 #endif
 #endif
 
-#if defined(MAC_OSX)
+#if defined(__APPLE__)
         int val = 0;
         size_t len = sizeof(val);
         if (sysctlbyname("hw.optional.arm.FEAT_SHA256", &val, &len, nullptr, 0) == 0) {