Domain Mapping on Local Machine

I've successfully downloaded my multisite website from the server and I want to run it locally on my laptop. I did this by using ServerPress to get the site to installation locally. The problem I'm having is, I can log into the admin side of the WP site, but I cannot change the 7 mapped domains to point to my .dev version of the domain. When I go to Sites > All Sites as the Super Admin in the Network Admin area, my list of mapped domains shows them all using .com instead of .dev. How can I change those previously mapped domains to .dev so I can see the "public facing" version of the sites?