Same here, tested on MacOS Ventura and Windows 11, same thing: 1 - launch Unity Hub by clicking the app icon. 2 - on windows nothing happens, on MacOS the icon is jumping in the dock... 3 - after 15 seconds the Unity Hub windows appear and shows the logo. 4 - 5 seconds more to see the project list. Total of 20 seconds to open a window containing a list of project !