Thank you for your post!
I'm sorry for the inconvenience! Would you mind providing the ISBN of your book?
You're most likely encountering a Gatekeeper issue. You'll need to set your Mac to allow applications download from anywhere.
Gatekeeper options are found in Apple menu > System Preferences… > Security & Privacy > General tab under the header "Allow applications downloaded from:"
I hope this helps! Please let me know if you have any questions. Have a nice day!
The ISBN is 978-1-118-64395-2
And changing the Gatekeeper options definitely worked. Thanks so much!
Paige Hannah | Database Administrator | Information Technology | Vanderbilt University