How can I set up Preview Signature without Trackpad or Camera?

I use Preview a lot. Especially for quickly signing documents. On my new Hac, I've just discovered a small but irritating limitation of my machine. Preview only allows you to setup a signature if you have either a camera or a trackpad connected. I've got neither on this machine.

I even tried following this to simply import my signature (which I painstakingly perfected) from my old Macbook to this new machine, but because of the above mentioned roadblock, there's also no key in keychain to edit with the key from my old MBP.

Has anyone else run into this issue? If so, have you found any solution that didn't involve borrowing a cheap webcam from Amazon?

Thanks!

submitted by /u/great_waldini
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