Creating custom keyboard shortcuts on Mac seems to have an issue keeping the correct meta key mapped. During the same session a shortcut is set it will work fine. After restarting any Cmd shortcuts will be changed to Ctrl, and vice versa. The editor will change the mapping each time the editor is reopened and Swap them to be the opposite of what it read them as the previous time.
Hi Tokyo Bits,
I was able to reproduce this on our Macs and have entered the following bug report: UE-35039. You can track the status of this ticket here: Unreal Engine Issues
Thanks for bringing this to our attention,
.