Saw this discussion at the FlexRadio community: https://community.flexradio.com/discussion/8029744/halikey-remote-ptt-fob-and-cw-for-mac/
The little device certain looks very useful.
HaliKey is a small USB device that connects morse code paddles, or a physical PTT switch, to a computer. This allows you to use physical controls when operating your radio remotely.
Ordered some from: https://electronics.halibut.com/product/halikey/
They are on backorder when I ordered, so it may be a while until I have them in-hand to try out.
73
Steve
K9ZW
With Varying Frequency - Amateur Radio Ponderings 
I’d love to hear what you think of it. If it works it’s a fabulous deal.
73,
Todd, NØIP
Will be a few weeks before much testing happens. Basically they arrived much ahead of when I’d projected my schedule for testing would open up.
The schedule is a bit shambolic at the moment as well. That’s my fault.
73
Steve
K9ZW