macOS: Fix an issue in detecting the correct API level available

This may be due to a bug in the macOS SDK but the user facing
versions of these preprocessor definitions are returning the
incorrect details for at least the macOS 26 SDK

Author: Anthony-Nicholls

modules/juce_core/system/juce_TargetPlatform.h

@@ -128,15 +128,15 @@
 
 // Expands to true if the API of the specified version is available at build time, false otherwise
 #define JUCE_MAC_API_VERSION_CAN_BE_BUILT(major, minor) \
-    ((major) * 10000 + (minor) * 100 <= MAC_OS_X_VERSION_MAX_ALLOWED)
+    ((major) * 10000 + (minor) * 100 <= __MAC_OS_X_VERSION_MAX_ALLOWED)
 
 // Expands to true if the API of the specified version is available at build time, false otherwise
 #define JUCE_IOS_API_VERSION_CAN_BE_BUILT(major, minor) \
     ((major) * 10000 + (minor) * 100 <= __IPHONE_OS_VERSION_MAX_ALLOWED)
 
 // Expands to true if the deployment target is greater or equal to the specified version, false otherwise
 #define JUCE_MAC_API_VERSION_MIN_REQUIRED_AT_LEAST(major, minor) \
-    ((major) * 10000 + (minor) * 100 <= MAC_OS_X_VERSION_MIN_REQUIRED)
+    ((major) * 10000 + (minor) * 100 <= __MAC_OS_X_VERSION_MIN_REQUIRED)
 
 // Expands to true if the deployment target is greater or equal to the specified version, false otherwise
 #define JUCE_IOS_API_VERSION_MIN_REQUIRED_AT_LEAST(major, minor) \