The app on Mac is more open than the app itself, but the function of the system itself, using the command open-n to open a new instance of an application (self-input man open view meaning).
Reference: http://mac-how-to.wonderhowto.com/how-to/run-multiple-instances-same-app-mac-os-x-0140144/
In this way, unity can be opened more easily.
The path to Unity.app on my Mac is as follows:
So:
1. Open the terminal.
2,CD ~ Go to the user directory and run the command:
Open-n/applications/unity/unity.app
A Unity Launch dialog pops up, and the second Unity Launch dialog pops up if you run the command above again.
This makes the implementation more open.
Add:
To show the launch screen (instead of directly into the editor) when Unity starts, load Previous Project on startup in Preferences->general is unchecked (by default it's unchecked).
Unity5, open more under Mac