If you are like me and ordered a cheap arduino nano clone from a chinese website like aliexpress or banggood, chances are that they come with the cheaper CH340 USB to Serial chip. This is a cheap chip that manufacturers exploit to make the clone a lot cheaper. This can also be a downside. For me, being a mac user, I had a real hard time finding drivers etc for it. In the end I found some drivers, which were pretty good and I finally could get a blink sketch uploaded. I now want to share my experience for future buyers so you can get it working a lot faster. Enjoy!
Basically, let me put it this way. Buy from chinese site, get chinese drivers. I got my drivers from here. Once you have downloaded the file. Unzip the install file and start the install process. Once this is done, reboot your computer. ALTHOUGH WAIT. If you have mac and are running yosemite. You will need to follow the instructions in the next step. If you are not a yosemite user, please skip the next step and restart your computer.