Open Two Project At The Same Time in Unity

Ever thinking about testing multiplayer stuffs using Unity without have to compile standalone to test them? This tips from this support website works flawlessly for me

https://support.unity3d.com/hc/en-us/articles/115003118426-Running-multiple-instances-of-Unity-referencing-the-same-project

I even managed to open 3 instance of the same project


for mac, please use this for hardlinking
https://github.com/selkhateeb/hardlink

when editing scene in MacOS, make sure the other scene saved by changing small thing and hit cmd+s. At the other opened Unity, press ctrl+r. I don't know, somehow sometimes the scene didn't updated