...that's it then. It is truly impossible to develop apps directly on a retail edition of a Samsung phone with build BOG5 or later - unless, of course, you are a carrier or Google employee. Nono, don't tell me they can't do it - you know they have special phones not available to the developer community with special bootloaders where they can write any app they want on it.
There are only two options left then:
a. If a level 1 hypervisor exists for Android devices in the Google Play store, then one could run AndroidX86's fine port as a virtual image on top of the locked OS on the phone. And if that worked one could flash a custom ROM on top of that. Of course, a level 0 hypervisor can't exist because installation of any system directly on the hardware is impossible except for carrier or Google developers. (I'm old enough to remember the IE/Netscape for Windows war, where IE had the clear advantage because the Windows developers were right down the hall, but the Netscape developers had no access. The CEO gave up and open sourced Netscape, which became Firefox. >

)
b. Run the AndroidX86 port on VMWare Fusion Pro for OSX, or in VirtualBox.
...And if NEITHER option is possible, then this...'open source' system called Android is in fact a CLOSED system to all but carrier and Google software developers.
Update: AndroidX86 version 4.x WILL load up in VMWare Fusion Pro. It won't run, however - but it will install and run.
Looks like my research is complete. Thanx to everyone who helped me, they were invaluable. :highfive: