FairyGUI Editor is green software, you just need to unzip it. To avoid unnecessary problems, do not unzip to a path with a Chinese name.
Click to open "System Preferences", then click "security and privacy" in it, find the interception with prompt at the bottom, and click the "still open" button here.
Old version download channel:
Windows-32bit http://res.fairygui.com/FairyGUI-Editor_X_X_X.zip
Windows-64bit http://res.fairygui.com/FairyGUI-Editor_X_X_X_win64.zip
Mac http://res.fairygui.com/FairyGUI-Editor_Mac_X_X_X.zip
Replace XXX with three numbers of version number.