Summary: We can ensure that we have activated the Installed copy of QuarkXPress on the computer by following the steps below :

Applies to - QuarkXPress 2015 and 2016 (Mac and Win)

Win
1. Launch QuarkXPress 2016
2. Navigate to Help > Transfer QuarkXPress License. [Note : If 'Transfer QuarkXPress License' option is available then the copy of QuarkXPress is activated.In case,it shows 'Activate QuarkXPress', please activate your copy of QuarkXPress.]

Mac
1. Launch QuarkXPress 2016
2. Navigate to QuarkXPress> Transfer QuarkXPress License'. [Note : If 'Transfer QuarkXPress License' option is available then the copy of QuarkXPress is activated.In case,it shows 'Activate QuarkXPress', please activate your copy of QuarkXPress.]