Disable flaky test on OS X/Intel. Refs #6096

Code/Mantid/Framework/CurveFitting/test/IkedaCarpenterPVTest.h

@@ -112,6 +112,12 @@ class IkedaCarpenterPVTest : public CxxTest::TestSuite
   // here tries to fit an IC peak to a Gaussian mock data peak
   void testAgainstMockData()
   {
+    /**
+     * Changing compiler on OS X has yet again caused this (and only this) test to fail.
+     * Switch it off until it is clear why the other Fit tests are okay on OS X using Intel
+     */
+#if !(defined __APPLE__ && defined __INTEL_COMPILER)
+
     Fit alg2;
     TS_ASSERT_THROWS_NOTHING(alg2.initialize());
     TS_ASSERT( alg2.isInitialized() );
@@ -203,6 +209,8 @@ class IkedaCarpenterPVTest : public CxxTest::TestSuite
     TS_ASSERT( categories[0] == "Peak" );
 
     AnalysisDataService::Instance().remove(wsName);
+
+#endif
   }