user15663: I've bought and Arduino Nano compatible on eBay:

But by the time I connect it to my Macbook Pro (OS X El Capitan 10.11.2) doesn't appear under "Tools -> Port" in Arduino IDE:

I've followed some instructions by other posts here in StackOverflow:

Arduino Nano no serial port for MacBook Air 2013
Arduino Nano with Mac OS Yosemite 10.10

But none of them worked :(
If someone could help me out with this issue I'll be grateful.
Thanks.

user15663: I was be able to solve the issue.
By looking for the serial chip my board has: CH340G I found this blog post: 
http://kiguino.moos.io/2014/12/31/how-to-use-arduino-nano-mini-pro-with-CH340G-on-mac-osx-yosemite.html
So I downloaded the signed driver for my chip and now it works :D
Driver: http://kiguino.moos.io/downloads/CH34x_Install.zip 

15663: <p>I've bought and Arduino Nano compatible on eBay:</p>

<p><a href="https://i.stack.imgur.com/Qax36.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Qax36.png" alt="enter image description here"></a></p>

<p>But by the time I connect it to my Macbook Pro (OS X El Capitan 10.11.2) doesn't appear under "Tools -> Port" in Arduino IDE:</p>

<p><a href="https://i.stack.imgur.com/IkAtJ.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/IkAtJ.jpg" alt="enter image description here"></a></p>

<p>I've followed some instructions by other posts here in StackOverflow:</p>

<ul>
<li><a href="https://arduino.stackexchange.com/questions/5119/arduino-nano-no-serial-port-for-macbook-air-2013">Arduino Nano no serial port for MacBook Air 2013</a></li>
<li><a href="https://arduino.stackexchange.com/questions/13813/arduino-nano-with-mac-os-yosemite-10-10">Arduino Nano with Mac OS Yosemite 10.10</a></li>
</ul>

<p>But none of them worked :(</p>

<p>If someone could help me out with this issue I'll be grateful.</p>

<p>Thanks.</p>
 15663: <p>I was be able to solve the issue.</p>

<p>By looking for the serial chip my board has: CH340G I found this blog post: </p>

<p><a href="http://kiguino.moos.io/2014/12/31/how-to-use-arduino-nano-mini-pro-with-CH340G-on-mac-osx-yosemite.html" rel="nofollow">http://kiguino.moos.io/2014/12/31/how-to-use-arduino-nano-mini-pro-with-CH340G-on-mac-osx-yosemite.html</a></p>

<p>So I downloaded the signed driver for my chip and now it works :D</p>

<p>Driver: <a href="http://kiguino.moos.io/downloads/CH34x_Install.zip" rel="nofollow">http://kiguino.moos.io/downloads/CH34x_Install.zip</a> </p>
