I hit this problem occasionally too, and this sequence has worked for me every time. The key seems to be clearing every session at once rather than one at a time: Sign out of the Claude Agent in Xcode (if it still shows you as signed in). Sign out of your Claude sessions in Safari. Close all Safari windows — including Safari Technology Preview if you have it installed. Quit the Claude desktop app. Quit Xcode and restart the Mac. Then sign in again from Xcode → Settings → Intelligence.