One arduino uno two computers

Hello

I have an arduino uno sending midi messages to one mac via usb.
Now I would like to send the same midi messages to another mac at the same time.
Is it possible with just one arduino?

Which Arduino?
USB?
Buy a FTDI interface for the second computer.

I would like to use my arduino uno to send midi over usb to the two mac.

Ok. Could you give me some direction about using FTDI interface? Furthermore, will it be a driverless solution?

You should be able to connect the Tx pin (and Ground) to a TTL-USB cable (an FTDI Cable) and connect that to the second PC. I suspect you would run into problems if you also connect the Rx pin to the FTI cable. If you need 2-way communication you would need to use Software Serial to create a second serial port on your Uno.

The FTDI cable works without a driver on Linux so I guess it would be the same on a Mac. Drivers for Windows are readily available.

It is not possible to connect the same USB cable to two PCs.

...R

Thanks!!! I will go in this direction. For the moment I dont't need 2-way communication but may be in the future so I think I will do it with the "soft" serial port solution.

Just on last thing: I would prefere a female usb type B (like the onboard's one in arduino uno) rather than a cable outgoing from my case. Any suggeriment?

Most USB/Serial boards have USB-B Mini or USB-B Micro connectors.
You can find Mini & Micro adapters to USB-B, such as:

You can also go with the Arduino USB/Serial adapter, which has a USB-B connector.