Re-enable multisampling for ATI cards on Mac 10.7.2 or newer.

gpu/software_rendering_list/software_rendering_list.json

Index: gpu/software_rendering_list/software_rendering_list.json
===================================================================
--- gpu/software_rendering_list/software_rendering_list.json	(revision 110204)
+++ gpu/software_rendering_list/software_rendering_list.json	(working copy)
@@ -54,7 +54,7 @@
 {
   "name": "software rendering list",
   // Please update the version number whenever you change this file.
-  "version": "1.23",
+  "version": "1.24",
   "entries": [
     {
       "id": 1,
@@ -233,17 +233,16 @@
     },
     {
       "id": 16,
-      "description": "Multisampling is buggy in some ATI Mac cards.",
+      "description": "Multisampling is buggy in ATI cards on older MacOSX.",
       "cr_bugs": [67752, 83153],
       "os": {
-        "type": "macosx"
+        "type": "macosx",
+        "version": {
+          "op": "<",
+          "number": "10.7.2"
+        }
       },
       "vendor_id": "0x1002",
-      "exceptions": [
-        {
-          "device_id": ["0x6760", "0x9488"]
-        }
-      ],
       "blacklist": [
         "multisampling"
       ]