Get the Google Meet mute mic keyboard shortcut working in Safari 14? I've had to switch from Chrome to Safari to get my external web cam to transmit in 720p quality. In the process, I've lost an essential keyboard shortcut in Google Meet: Cmd-D -- it mutes the microphone in Meet when running in Chrome or Firefox.
Unfortunately, Cmd-D is mapped to Bookmarks &gt; Add Bookmark... in Safari.
I don't see a way to un-map Cmd-D in Safari so the key pair press gets passed to the application running in the browser. Is this even possible in Safari? If so, how?
You just need to remove the unwanted command by replacing it with 'garbage' - something you don't already use or need...

System Prefs &gt; Keyboard &gt; Shortcuts &gt; App Shortcuts
Click + then add the name of your desired app.
Type the exact name of the menu item you wish to replace[1]
Add a garbage command [anything will do, so long as it's not going to conflict anywhere else]


[1] This is especially important if the menu ends in an ellipsis … which typographically is not the same as three full stops ...
There is no need to specify any menu/sub-menu structure, no matter how far down the hierarchy your menu item may be - it will always find it using just the actual item name.
If you have two menu items with the same name but in different sub-menus, you can differentiate by giving the actual menu path using -&gt; as the sub-menu indicator, eg
File-&gt;Open-&gt;Open Special Name