You can install Final Draft 10 / 9 on as many computers as you want. Two of these can be activated at a given time. You can activate two Macs, two PCs or one of each -- it doesn't matter.
If you have more than two computers on which you'd like to run Final Draft, you can either deactivate one computer and move the activation to another, which is 100% free (for more information on deactivating, click HERE) or you can purchase additional activations. Note that additional activations must be used only by the registered owner only on computers he or she owns and operates.
Please call our sales line, 800-231-4055, if you are interested in purchasing an additional activation.