Artificial Light Photography by Ansel Adams
I found the Vade Mecum folder on my iMac, but I'm pretty sure I installed Palm Desktop on my Windows 10 computer, and then used that platform to install Vade Mecum onto my Palm IIIx. IIRC, you can't run even the latest version of Palm Desktop on an Intel-based Mac; requires PowerPC. But, hey, I'm old and the gray matter ain't what it used to be! It was quite some time ago that I fooled around with it all. I know...no help to you!
I had planned to use the tool in my LF pursuits, but found it difficult to learn so I finally just gave up on it. If you care to pass along some tips and tricks, I'd certainly do what I can to help you get it installed.