Unity pro installation on multiple computer

I just obtained a copy of unity pro serial key from unity3d and I was wondering how many times I can use it. the package I received says install max is 2. I was wondering if that was the amount of computer i’m allowed to have unity pro installed on. I’m using multiple computers so I would like to know how I can transport my unity pro from one computer to the next to make work more convenient. If anyone can help with my question I would appreciate it. Thanks

The EULA is pretty explicit about this. Under condition 1b:

…you may install the Software on both a primary computer and a secondary computer, solely for your convenience, but only for use by a single person.

You could get in touch with Unity Technologies about an exception or other arrangement, but as far as I know their authentication scheme will start to get pretty upset if you try to install the same key on too many computers.

May I just say, for anyone that still needs an answer to this, if you go to help>Manage License… You can “Return License”. This means if you need to use different computers, just deactivate the license after you’re done with it on one computer, then activate it on the other computer you need to use.