diff -r 1cdaa54040dd -r 9c735c7bc6db Lib/test/test_io.py
--- a/Lib/test/test_io.py	Thu Aug 04 19:59:10 2016 +0200
+++ b/Lib/test/test_io.py	Thu Aug 04 12:13:47 2016 -0500
@@ -557,24 +557,6 @@
         with self.open(support.TESTFN, "w+b") as f:
             self.large_file_ops(f)
 
-    def test_large_writes(self):
-        support.requires('largefile',
-            'test requires %s bytes and a long time to run' % self.LARGE)
-        with self.open(support.TESTFN, "wb") as f:
-            b = bytearray(self.LARGE)
-            self.assertEqual(f.write(b), self.LARGE)
-
-    def test_large_reads(self):
-        support.requires('largefile',
-            'test requires %s bytes and a long time to run' % self.LARGE)
-        with self.open(support.TESTFN, "wb") as f:
-            b = bytearray(self.LARGE)
-            self.assertEqual(f.write(b), self.LARGE)
-
-        with self.open(support.TESTFN, "rb") as f:
-            self.assertEqual(f.read(self.LARGE), self.LARGE)
-
-
     def test_with_open(self):
         for bufsize in (0, 1, 100):
             f = None
diff -r 1cdaa54040dd -r 9c735c7bc6db Python/fileutils.c
--- a/Python/fileutils.c	Thu Aug 04 19:59:10 2016 +0200
+++ b/Python/fileutils.c	Thu Aug 04 12:13:47 2016 -0500
@@ -1187,13 +1187,6 @@
         /* On Windows, the count parameter of read() is an int */
         count = INT_MAX;
     }
-#elif defined(__APPLE__)
-    if (count > INT_MAX) {
-        /* Issue #24658: On OSX read(2) will fail when reading more than INT_MAX
-         * bytes.
-         */
-        count = INT_MAX;
-    }
 #else
     if (count > PY_SSIZE_T_MAX) {
         /* if count is greater than PY_SSIZE_T_MAX,
@@ -1263,12 +1256,6 @@
     }
     else if (count > INT_MAX)
         count = INT_MAX;
-#elif defined(__APPLE__)
-    if (count > INT_MAX) {
-        /* Issue #24658: On OSX write(2) will fail when writing more than
-           INT_MAX bytes. */
-        count = INT_MAX;
-    }
 #else
     if (count > PY_SSIZE_T_MAX) {
         /* write() should truncate count to PY_SSIZE_T_MAX, but it's safer