I use WordPress keyboard shortcuts a lot, but Safari's use of Cmd + [Num] (e.g. 1, 2, 3) is overriding WordPress' use (which formats text with tags).
How can I disable Safari's use of the keyboard shortcut so that I can use it for WordPress?
The shortcuts are defined as the first few bookmarks in your Bookmarks Bar. You can see which bookmarks are defined by going to Bookmarks → Favorites Bar. Since they are menu items, you can disable them by remapping them to something else.
Open System Preferences → Keyboard → App Shortcuts.
Click the + to add a new shortcut.
Set the Application to Safari, the Menu Title to the exact name of one of your bookmarks, and the Keyboard Shortcut to something other than ⌘#.
Repeat the process for the other bookmarks.
i had the same issue, my stupid fingers type CMD+2 instead of ALT+2, i notice that bookmarks automatically assigns this option and you can't disable it, BUT! the only way is to delete roots, on your favorite, the direct link is assigned to CMD+#, but if your favorite is inside a folder it doesn't get a #, so, you need to MOVE your direct shortcuts to a folder, then you'll lose the shortcut of evil! THAT RESOLVE MY ISSUE!!!