CAN'T UPGRADE RESTORE MY iTUNES from macOS 10.11 to 10.12 why?

I'll give that review

the first issue with the process is CONSOLIDATE FILES (not sure how that will alter my iTunes folder, ie move songs around) and it's a huge 170gb folder to experiment with

second and third

Keep iTunes media folder organized (I recall that will drastically reorganize my folders; my folders are already organized the way I want them; I don't want to change anything)

Copy files to iTunes Media folder when adding to library (I don't import my new songs that way because I like to control the process)

there is a chance my 170gb iTunes folder corrupted in coping it over to the new 10,12 install

I will try it again

meanwhile, I am wondering if something in iTunes has changed to break my long-trusted backup and restore process from a maxOS OS-X10.11 to 10.12 (2011-2010 Mac Pros)

>>In most cases you simply need to copy the entire iTunes folder from your old computer into the user's music folder of the new computer

thanks for the link - that's exactly what I'm doing and it has worked without issues for me dozens of times in the past

however, I've never restored it to macOS 10.12 or higher so I am wondering if 'progress' is a factor where that method is no longer reliable

still have solid backups of my iTunes folder to try again...

WANT TO ADD recopying my backup 170 GB iTunes folder into my User>Music worked as soon as I opened iTunes with no extra steps (like it has always been there).

All 30,000 songs, playlists, artwork accounted for.

WHEW!

Thanks U give me hope it should work with 10.12 (and not an Apple OS or iTunes 'improvement')...