WCH341 is a quite nice (and cheap) USB adapter (I got one by almost 3USD). Works perfect in Windows and Linux, but for mac it's another story…..
After lots of searches and drivers, I found this guy .
Note: Isn't a driver, it's a software that can connect using your cable, but don't worry, the software is very nice and works perfect.
Also, the developer is a nice guy and answer my mail quite fast when I had a problem with the last version. Thanks Aaron.