--- a/jdk/src/java.base/unix/classes/sun/security/provider/NativePRNG.java	Tue May 10 17:16:55 2016 +0300
+++ b/jdk/src/java.base/unix/classes/sun/security/provider/NativePRNG.java	Wed May 11 08:39:36 2016 +0800
@@ -469,7 +469,8 @@
                     try {
                         seedOut.write(seed);
                     } catch (IOException e) {
-                        throw new ProviderException("setSeed() failed", e);
+                        // Ignored. On Mac OS X, /dev/urandom can be opened
+                        // for write, but actual write is not permitted.
                     }
                 }
                 getMixRandom().engineSetSeed(seed);

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/security/SecureRandom/MacNativePRNGSetSeed.java	Wed May 11 08:39:36 2016 +0800
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import java.security.SecureRandom;
+
+/* @test
+ * @bug 8156709
+ * @summary Cannot call setSeed on NativePRNG on Mac if EGD is /dev/urandom
+ * @requires os.name == "Mac OS X"
+ * @run main/othervm -Djava.security.egd=file:/dev/urandom MacNativePRNGSetSeed
+ */
+public class MacNativePRNGSetSeed {
+    public static void main(String[] args) throws Exception {
+        SecureRandom sr = SecureRandom.getInstance("NativePRNG");
+        sr.setSeed(1);
+    }
+}