Re: odd statement in install instructions
Fascinating are the ways of man and computer. ;-)
I've used Macs since 1985 and never once have I seen or heard of any way that I could choose to use or not use long file names. It's just part of the operating system, and is not now and has never been under user control.
Which leaves me wondering what the heck people meant when they said that they changed settings to use long file names. (Great advice I read ages ago: when you're having a communication problem, accept that what the other person says is true, then try to imagine what it could be true of.)
Leaving that aside, I don't think the issue has to be raised at all. Just leave out the second sentence. The statement "...by default, MAC OS tends to not maintain long filenames..." is factually wrong, and since the user has no control over long file name use by the OS, you shouldn't leave them with the impression that they do.
You should, of course, confirm what I'm saying with someone more used to spelunking the guts of the OS. I'm a highly knowledgeable user, but not what I call a "deep doo doo" user. (That is, a programmer. )
Breakfast: the most important donut of the day.