How can you edit the same xcode project from different macs at the same time?

Did you look at XCode server ?

h ttps://developer.apple.com/library/content/documentation/IDEs/Conceptual/xcode_guide-continuous_integration/

May have a look at this tutorial

h ttps://honzadvorsky.com/articles/2015-08-04-xcs_tutorials_1_getting_started/

>edit it from all of our different devices at the same time

Teams do not edit one instance of a project simultaneously; they work their changes independently and rely on source control to handle merging them together in a master project.

https://developer.apple.com/library/content/documentation/IDEs/Conceptual/xcode_guide-continuous_integration/adopt_continuous_integration.html

I guess these answers are incorrect. There are platforms that allow editing of the same windows (your IDE) at the same time. Also, you should always be using some type of Git for version tracking. Just do a quick search and you will find a handful of resources out there and some fancy work arounds.