Oops, I just checked, and High Sierra did run Photos, but an early version of the database. It did get updated often going to Catalina, though.
-Carl > On Jul 1, 2021, at 4:31 PM, Carl Hoefs <newsli...@autonomy.caltech.edu> wrote: > > High Sierra ran iPhoto; Catalina runs Photos. The two photo database formats > are totally incompatible, which is why it upgrades the database. And I know > that somewhere along the way (from HS to Catalina) it did a forced upgrade of > the mailboxes. > > So my guess is that your undertaking would be an exercise in futility... > > (And ditto your frustration with the iMac's gossamer-thin screen connection > wires: What were they thinking?) > > -Carl > >> On Jul 1, 2021, at 3:51 PM, Macs R We <macs...@macsrwe.com >> <mailto:macs...@macsrwe.com>> wrote: >> >> I have a client running Catalina on an old 2013 iMac with a spinner. There's >> no reason he needs to be running Catalina (he still uses Lotus 123, for >> heaven's sake), he is apparently just a low-information victim of Apple's >> antisocial robo-nag campaign to "Upgrade! Upgrade!! Upgrade!!!" >> >> His machine is now crawling. >> >> My preference would be to clone his machine to an external, wiping it, >> install fresh High Sierra, and then migrate his files back in. But I'm >> unsure whether there have been format changes between HS and Catalina in >> personal databases such as Photos, Address Book, mailboxes, and the like >> that would queer this… or whether File Migration might just arbitrarily nix >> the importation out of principle. Not to mention knowing that the System >> Settings category (WiFi networks, Apple IDs, Sharing, Accessibility, etc.) >> would probably be un-migratable in toto, but that's less important as it can >> be addressed manually. >> >> Can anyone say if this reverse-migration is doomed before it's tried? >> >> The alternative would be to swap out his HDD with an SSD and clone it over, >> which would be a more costly job in terms of hardware fiddlery time (I hate >> working on iMacs, having to disconnect all the fragile display screen >> connectors to do the simplest things), pus the cost of a new TB drive. >> >> (Damn Apple's irresponsible pressure on typical consumers to upgrade their >> OSes.) >> >> -- >> Macs R We -- Personal Macintosh Service and Support >> in the Wickenburg and far Northwest Valley Areas. >> http://macsrwe.com <http://macsrwe.com/> >> _______________________________________________ >> MacOSX-talk mailing list >> MacOSX-talk@omnigroup.com <mailto:MacOSX-talk@omnigroup.com> >> https://www.omnigroup.com/mailman/listinfo/macosx-talk > > _______________________________________________ > MacOSX-talk mailing list > MacOSX-talk@omnigroup.com > https://www.omnigroup.com/mailman/listinfo/macosx-talk
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