With a creative cloud membership you can install your programs on up to 2 devices. To install you just have to install the creative cloud program and sign in.
I have CC Teacher & student membership and i can run the programs (simultaneous) on my macbook and my windows PC.
Thank you Tristan,
i've tried but the system asked me to register the product and insert a serial number. Could you kindly tell how to do to install the service on the second mac?
On your second computer go to http://creative.adobe.com and log in.
Then go to the download centre (second button in the menu bar).
There you can download the creative cloud app.
Once installed open it and enter your adobe login details.
Once logged in you can download the items corresponding to your subscription (in your case photoshop). Once the download and install is complete you have photoshop on your system.
There are issues with a number of people that their apps continue in trial mode. It is possible you are one of those people without knowing it. I have been having that issue for a couple of weeks now. For some reason my creative cloud apps won't login to register my subscription.
If you are not able to install it on your second computer by following these steps please tell me in what step you couldn't continue.