GPU: Add more explicit message for Mac + Nvidia platform

This fixes the confusion, as the previous message
could let to believe you could make the GPU to work
by upgrading to newer MacOS version.

Rel #130224

Pull Request: https://projects.blender.org/blender/blender/pulls/130231

source/blender/windowmanager/intern/wm_platform_support.cc

@@ -158,15 +158,25 @@ bool WM_platform_support_perform_checks()
       slen = 0;
 
 #ifdef __APPLE__
-      STR_CONCAT(message,
-                 slen,
-                 CTX_IFACE_(BLT_I18NCONTEXT_ID_WINDOWMANAGER,
-                            "Your graphics card or macOS version is not supported"));
-      STR_CONCAT(message, slen, "\n \n");
-      STR_CONCAT(message,
-                 slen,
-                 CTX_IFACE_(BLT_I18NCONTEXT_ID_WINDOWMANAGER,
-                            "Upgrading to the latest macOS version may improve Blender support"));
+      if (GPU_type_matches(GPU_DEVICE_NVIDIA, GPU_OS_ANY, GPU_DRIVER_ANY)) {
+        STR_CONCAT(
+            message,
+            slen,
+            CTX_IFACE_(BLT_I18NCONTEXT_ID_WINDOWMANAGER, "Your graphics card is not supported"));
+      }
+      else {
+        STR_CONCAT(message,
+                   slen,
+                   CTX_IFACE_(BLT_I18NCONTEXT_ID_WINDOWMANAGER,
+                              "Your graphics card or macOS version is not supported"));
+        STR_CONCAT(message, slen, "\n \n");
+
+        STR_CONCAT(
+            message,
+            slen,
+            CTX_IFACE_(BLT_I18NCONTEXT_ID_WINDOWMANAGER,
+                       "Upgrading to the latest macOS version may improve Blender support"));
+      }
 #else
       STR_CONCAT(message,
                  slen,