PERRLA for Word (Mac) doesn't make you activate the software like PERRLA for Word (Windows).
Instead of activating your software with a key, you just log in with your PERRLA Account email and password.
The first time you open PERRLA for Word after installation, you will be asked to enter the email address and password you used when purchasing PERRLA. If you haven't purchased PERRLA yet, you can start a Free Trial directly within the app.
Once you log in, PERRLA will remember your login information for the next time you open it. You won't have to log in every time you use it.