Hi ET, Have you tried running first aid with disk utility from either volume? I would try this first.
If that fails, (not knowing any other specifics of the situation) if it were me, I’d back up both volumes to time machine, boot into recovery mode and then perform first aid on the entire drive from there. I don’t have it in front of me just at the minute, but you may also be able to see the entire drive in Disk Utility from within one of the volumes without needing to go into recovery mode. I would absolutely make sure you have working backups before you do any of this though. :) Very best of luck and please keep us up to date with what you find in your research or what you find that works. Cheers! Cara > On May 1, 2024, at 6:55 PM, 'E.T.' via MacVisionaries > <macvisionaries@googlegroups.com> wrote: > > Google seems to point to the master boot record (MBR). Anyone have > experience with this function? > > From E.T.'s Keyboard... > "Alone we can do so little; together we can do so much." > -Helen Keller > My e-Mail: > ancient.ali...@icloud.com > > On 5/1/2024 2:21 PM, 'E.T.' via MacVisionaries wrote: >> Hello, >> Having installed Ventura in an APFS volume and set it up, if I do a >> startup and go to the Sonoma volume, I cannot subsequently start up to >> Ventura. What got broken here and can it be repaired? Thanks very much. >> From E.T.'s Keyboard... >> "Alone we can do so little; together we can do so much." >> -Helen Keller >> My e-Mail: >> ancient.ali...@icloud.com > > -- > 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. You can reach mark at: > mk...@ucla.edu and your owner is Cara Quinn - you can reach Cara at > caraqu...@caraquinn.com > > The archives for this list can be searched at: > http://www.mail-archive.com/macvisionaries@googlegroups.com/ > --- You received this message because you are subscribed to the Google Groups > "MacVisionaries" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to macvisionaries+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/macvisionaries/9dac2548-352e-4d93-a7f2-20cba22d6964%40icloud.com. -- 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. You can reach mark at: mk...@ucla.edu and your owner is Cara Quinn - you can reach Cara at caraqu...@caraquinn.com The archives for this list can be searched at: http://www.mail-archive.com/macvisionaries@googlegroups.com/ --- You received this message because you are subscribed to the Google Groups "MacVisionaries" group. To unsubscribe from this group and stop receiving emails from it, send an email to macvisionaries+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/macvisionaries/A2DA85BB-7814-4844-A9FF-33762B6E7D24%40gmail.com.
