This will be very difficult to implement because [detecting the Command key on Mac OS using JavaScript is done very differently](https://stackoverflow.com/questions/3902635/how-to-capture-macs-command-key-via-javascript). I don't think it's worth it.

Also, it's likely that the OS will capture Command-key equivalents before the application does. It's very rare to be able to use <kbd>⌘</kbd>-<kbd>Any</kbd> key combination on websites. I don't think most users will expect it.

Besides, should you just be writing markdown? :-)

**EDIT:** I can confirm this *does* work in Chrome for Mac... Meaning I change my position. This should be fixed to be made uniform. Either support it uniformly, or don't.