MacOS ugly hack documented
diff --git a/README b/README
index 7d97acb..3dc98e4 100644
--- a/README
+++ b/README
@@ -243,7 +243,7 @@
 at the USB mass storage interface AGAIN because it 
 enumerates.)
 
-Try this, if you have a recent 2.6.x Linux kernel,
+Linux: Try this, if you have a recent 2.6.x Linux kernel,
 run (as root) something like:
 
 > rmmod usb_storage ; mtp-detect
@@ -277,6 +277,25 @@
 the device is already configured for USB mass storage when
 udev is called.
 
+On Mac OS there is another ugly hack:
+
+1. Open up a terminal window
+2. Type:
+sudo mv /System/Library/Extensions/IOUSBMassStorageClass.kext
+/System/Library/Extensions/IOUSBMassStorageClass.kext.disabled
+
+and when prompted enter your password.
+
+3. Restart.
+
+To reverse this change, just reverse the filenames:
+
+sudo mv /System/Library/Extensions/
+IOUSBMassStorageClass.kext.disabled /System/Library/Extensions/
+IOUSBMassStorageClass.kext
+
+and restart.
+
 
 Calendar and contact support:
 -----------------------------