How many USB ports are on the MAC? I am not counting the keyboard ports either.
The problem that most MAC users run into is there is not enough USB ports on the computer. USB is the way to go. But if you have your dongle plugged into one of the ports then if I am thinking correctly that would just leave you one port left and that would be taken by the FC7000.
In my opinon stay away from the wireless, some here on the 101 may choose this option but in my experience there is to many possibilities of data drop running a wireless system, which would result in alot of waste.
If you do end up having 2 extra USB ports then using flexi this can be done. I am assuming that the second plotter
(I want to run a couple Graphtec plotters)
is going to be a FC7000 aswell?
You just have to make sure to map the usb ports correctly. By default, the Graphtec USB port loads automatically, but for the second plotter you will have to map it so you can communicate to it aswell.
If you go through with this setup, let me know and I will help you get it hooked up and working.
There is also another option to--the first plotter could be hooked up USB as normal, and the second one can be connected using a keyspan adapter with a serial cable. The Keyspan adapter is a usb to serial connection that works very well with these sort of plotters.
OK so there is some info and options for you.
Hope this helps