nite that recent OSX tun/tap is unsupported

Author: djmdjm

README.platform

@@ -53,11 +53,12 @@ Darwin does not provide a tun(4) driver required for OpenSSH-based
 virtual private networks. The BSD manpage still exists, but the driver
 has been removed in recent releases of Darwin and MacOS X.
 
-Nevertheless, tunnel support is known to work with Darwin 8 and
-MacOS X 10.4 in Point-to-Point (Layer 3) and Ethernet (Layer 2) mode
-using a third party driver. More information is available at:
+Tunnel support is known to work with Darwin 8 and MacOS X 10.4 in
+Point-to-Point (Layer 3) and Ethernet (Layer 2) mode using a third
+party driver. More information is available at:
 	https://tuntaposx.sourceforge.net
 
+Recent Darwin/MacOS X versions are likely unsupported.
 
 Linux
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