Jonathan and Tim, Thanks for all the tips.
Here’s what I’ve found over the weekend. Yes, deleting those apparently unnecessary volumes does cause eventual problems. So after cleaning up, and creating a new clean APFS volume next to my Mojave, I ran the Big Sur installer. Migrated using my Time Machine backup. Result was a working copy of Big Sur, and an extra volume called Catalina. Strange, yes. However the switching problem still remains. Weeks ago I was easily able to switch back/foreth between Catalina and Mojave. So of course I wanted to follow up by moving up to Monterey. Regardless of which (Big Sur or Monterey) is the new OS, I am able to switch back to Mojave, but never from Mojave back to Big Sur or Monterey. I end up with a Mojave volume, a Big Sur or Monterey Data volume, and a volume called Update. That is where I am now. Cannot switch back to Big Sur using the Start Disks dialog in System Preferences. So I was beginning to wonder (as Jonathan suggested) if I should wipe clean and install Monterey and then try to install Mojave on a second APFS volume, thereby having the new 64-bit OS as a “primary” and Mojave as a “secondary. Does that sound like a meaningful project for another weekend? Dave Carlson Oregonian, Engineer, Musician, Farfar, Woodworker, and Pioneer On Mar 14, 2022, at 7:50 AM, 'Tim Kilburn' via MacVisionaries <macvisionaries@googlegroups.com> wrote: Hi, Definitely do not delete the other volumes. Catalina and newer have changed the volume structure so that the main system files are on the boot volume, and data is stored in other volumes. This is to allow for the new process of “Erase All Data & Settings”. Similar to iOS and iPadOS, this is now a process available on your Mac. Essentially, it allows the Mac to do a “quick” revert to basic factory install. Later… Tim Kilburn Jamf Certified Tech Apple Professional Learning Specialist Apple Teacher (with Swift Playgrounds Recognition) Fort McMurray, AB Canada > On Mar 14, 2022, at 08:02, Jonathan Cohn <jon.c.c...@gmail.com > <mailto:jon.c.c...@gmail.com>> wrote: > > Hello David, > I was hoping that somebody with more experience with multiple systems would > reply to your query. Since it is now the work week, perhaps the best thing > would be to call Apple and see if they can untangle what is happening on your > system. What I was suggesting was to completely wipe your computer disk > clean, then install Monterey. After installing Monterey, then install a VM > product and run your 32 bit applications from it. > Here is a link to a tidbits article about this: > https://tidbits.com/2019/09/18/moving-to-catalina-keep-your-32-bit-mac-apps-running-with-parallels/ > > <https://tidbits.com/2019/09/18/moving-to-catalina-keep-your-32-bit-mac-apps-running-with-parallels/> > Historically, VmWare has been more accessible for screen reader users than > Parallel, but I am not sure if that is still true. There are other reasons, > why older applications might not run on Monterey mostly due to features that > make your computer more likely to be compromised for example putting > configuration information in system directories, installing kernel extensions > or using plug-inn technology. > For that matter, I understand that the MacOS version that will be coming out > next week, changes the way OneDrive, Google Drive and similar services can > clone parts of the file system. Before upgrading to that version, if you use > any of these check their release notes. > Jonathan > > >> On Mar 12, 2022, at 23:42, Dave Carlson <dgcarlson0...@gmail.com >> <mailto:dgcarlson0...@gmail.com>> wrote: >> >> Jonathan, >> >> So you suggest I first update to Catalina, then Big Sur, and then finally >> Monterey? Each upgrade overlaying the previous? Where can I get a full >> installer of Catalina and Big Sur these days? >> >> Dave Carlson >> Oregonian, Engineer, Musician, Farfar, Woodworker, and Pioneer >> >> On Mar 12, 2022, at 8:25 PM, Jonathan C. Cohn <jon.c.c...@gmail.com >> <mailto:jon.c.c...@gmail.com>> wrote: >> >> Webb, perhaps it is because you moved such a large distance change in OS. >> You might want to consider getting the free version of VMWare and putting >> Mojave on it assuming the 32 bit apps are not to dependent on performance. >> 12.2 does create two or more volumes one is the core OS in a read-only >> system and I have seen snapshot volumes appear. >> >> Sent from my iPhone >> >>> On Mar 12, 2022, at 10:13 PM, Dave Carlson <dgcarlson0...@gmail.com >>> <mailto:dgcarlson0...@gmail.com>> wrote: >>> >>> I just installed Monterey on a separate APFS volume, so that I could >>> continue to use Mojave for a couple older apps. >>> >>> I started with a clean volume. I ran the upgrade from System Preferences >>> and installed to that empty volume. >>> >>> After all the setups and migrations, I find that instead of just having two >>> volumes (Mojave and Monterey) I have the following: >>> >>> Mac Monterey OS >>> Mojave OS >>> Big Sur OS >>> Monterey OS >>> MAc Catalina OS >>> Mac Monterey OS >>> Catalina OS >>> >>> Some of these Monterey volumes are versions 12.0 and 12.1, and one is 12.2. >>> The Big Sur volume is 12.2 >>> The Catalina volume is 12.1 >>> >>> Only one of the Monterey volumes is correctly identified as the latest >>> version, and the Mojave is correct at 10.14.6. >>> >>> All these extra volumes show up in Disk Utility, and also on the startup >>> disks list in System Preferences. >>> >>> Can I just delete the extra volumes I don’t need nor want? >>> >>> Is this typical? >>> >>> Dave Carlson >>> Farfar, Engineer, Oregonian, Woodworker, and Pioneer >>> >>> -- >>> The following information is important for all members of the Mac >>> Visionaries list. >>> >>> If you have any questions or concerns about the running of this list, or if >>> you feel that a member's post is inappropriate, please contact the owners >>> or moderators directly rather than posting on the list itself. >>> >>> Your Mac Visionaries list moderator is Mark Taylor. 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