No /dev/tty.usbmodem on OS X 10.9.3

Development Tools IDE 1.x
1

I try to use Nano3 with mac OS 10.9.3.
I installed last ftdi driver from [http://www.ftdichip.com/Support/Documents/AppNotes/AN_134_FTDI_Drivers_Installation_Guide_for_MAC_OSX.pdf]this manual [/url]. But I do not see /dev/tty.usbmodem device and do not see it in arduino IDE port selecting menu.
I read many topics and tried everything: different cabels, enable/disable apple built-in drivers, reboot system every time. But nothing helped.
All that I see - USB2.0-Serial in an Apple System Profiler

USB2.0-Serial:

  Product ID:	0x7523
  Vendor ID:	0x1a86
  Version:	 2.54
  Speed:	Up to 12 Mb/sec
  Location ID:	0xfa130000 / 6
  Current Available (mA):	500
  Current Required (mA):	Unknown (Device has not been configured)

How I can get debug info about problem?

P.S. Board works well on Windows 8.
I'm new in Arduino.

2

Vendor ID 0x1a86 is apparently NOT an FTDI device (you have a Nano "clone", rather than a genuine article.)
Checking around, it seems that it is a "ch341" USB/Serial driver, and doesn't have a MacOS driver.
https://discussions.apple.com/message/10802537
http://wch-ic.com/product/usb/ch341.asp

3

Yes. You are right. Thanks for help!