Victoire j'ai trouvé la solution sur le forum de discutions Apple, inconvenient, c'est en anglais. Voici la solution en live :
1. Empty your cache & History settings via the Safari menu
2. Trash your Icons Folder:
HD>Users>Home>YourName>Library>Safari -->Icons
Restart Safari and a new folder will be automatically regenerated.
(This folder saves favicons of all the sites you visit. Needs cleaning periodically -- or you can change that file's preferences to "Read Only"
rather than "Read & Write." This will keep it from growing in size.)
5. Shut down your computer . . . unplug the computer, modem, and router, if you have one. Let everything sit for 2-3 minutes. Plug everything back in, start up your modem & router, then restart y
J'ai fait les étapes 1, 2, 5 et non les 3 et 4 trop longues et de plus je ne suis pas assez compétant.