I've given up on this and have the advantage in that I'm adding a new(used) iMac i7 27". While my system slow downs, Safari issues, occasional kernel panics and SBBOD may not be directly attributable to permissions being skewed - it's certainly a factor.
Even my 2011 MacMini started slowing down and having problems after Migrating migrations upon migrations all the way up from the 1990s across 8 different Macs (maybe more)...
I'm now hand installing everything from scratch on an clean install - one program at a time - and only the programs I actually use. Part of the problem is of my own making - adding programs over the years even if I didn't use them... or maybe use them a few times and then don't any more. So I will likely go from over 400 programs on the machine - to about 100.
On the source I'm actually very organized - one single user account - and only have the following user folders - Documents, Downloads, Dropbox, Business, Movies, Music, Pictures, Sites
I should be able to simply drag copy all of these one by one from a cloned drive to the new machine.
Permissions WILL STILL BE AN ISSUE however.
(If I still see "fetching" under those copies however - on an entirely new machine - different username - why not just DELETE IT?) - Will update with results as time allows...
In this case - I think all I would have to do is go to the top level directory of each of these copied folders and -
Get Info -
Permissions -
Add - MyUserName(me)
Add - any other users needed (Guest, Everyone, Admin)
(Optional - Delete old users)
GearTool - Apply to Enclosed Items
I'm not sure if SystemPreferences/FileSharing has any relevance here - but (for my personal needs) I also would make every single one of those directories "shared" - so I can freely go back and forth between my MacBook Pro or other Macs on the network. All of the lockdowns and permissions blockages in OSX have progressively been dismaying coming from OS9 where things were much more open and free. But time marches on and we must begrudgingly, change. lol
Anyway - for anyone else who is fed up and needs to do something drastic like this to relieve permissions and/or other system issues - this procedure can also be done without a second Mac. I would recommend having TWO full bootable backups before attempting this. With those in place - boot from OS disk - Disk Utility reformat the internal drive (GUID partition for INTEL Macs) - Reinstall OSX and all extra Applications etc. as on a new machine - create new User (part of setting up from a clean install) - and then install your programs all over again - one by one. Finally - copy your folders over and verify/change their permissions.
Tip - if you have a spare hard drive - don't delete those downloads, installers, DMG files etc. you use when rebuilding your system - KEEP COPIES on the spare drive. Many times they will also include an uninstaller you may want - also - if you need to do this procedure again it will make it much faster to have them all in one place! And don't forget to keep documentation of all your serial numbers, license codes, user name and passwords etc. there are many programs to help you keep track of them - but there's nothing like a good old fashioned spread sheet!
It's a lot of work and seems extreme, but hopefully worth it. If anyone who is more advanced than I would like to add to this or correct me on something - feel more than free!
I look forward to seeing what a system without any cobwebs can perform like - it's been years - maybe even decades since I've had a full house cleaning! The 2.93GHz i7 is also the highest end Mac I've ever owned so I hope to be dazzled! :-)