McAfee has two products for endpoint encryption:
1. McAfee EEFF (End point encryption for file and folder): Encrypts the files and folder
2. McAfee EEPC (End point Protection for PC) : it is the hard disk encryption
for EEFF i will recommend you to understand the PKI (Public Key Infrastructure).
Answer to your question is if the key is shared with the computer on which you have a copied the encrypted file you will be able to open that file, if key is not shared you won't be able to open it. EEFF completely works on key exchange mechnaism.
Thank You very much for response!