Our Library has a fusion drive Mac that dates to 2018. I upgraded to Ventura, then found a critical application won't run on it, so I have to roll it back to Monterrey. I tried to back it up with Time Machine, but it wouldn't recognize my NAS network drive, my 1TB USB drive, or a 32GB USB flash drive, even though the Finder saw all three. So I went ahead and wiped the drive, figuring I'd reinstall everything anyhow.
I hold down <Apple>-R when booting and get to the menu with disk manager and try to reinstall MacOS High Sierra. When I try to select either of the two drives that show up, Macintosh HD and Update, it says they're both locked. When I exit and go to disk manager, First Aid complete fine when I unmount both of them, but if I leave them unmounted then Install MacOS doesn't see them. What am I doing wrong? How do I unlock the drives to reinstall the OS, and which one do I use?
And while we're on the subject, our Mac is wired to the network with an Ethernet cable. Why is there no provision to use the Ethernet babled network - only a wireless connection comes up, and our Library has a security page you have to approve in a browser, so the connection on the Mac fails. I have to use my phone as a wireless hotspot to get as far as I did! But that's a side issue. I really want to get this Mac going for the public.
I maintain PCs in a library environment, and this is our only Mac. Thanks for your patience.
I hold down <Apple>-R when booting and get to the menu with disk manager and try to reinstall MacOS High Sierra. When I try to select either of the two drives that show up, Macintosh HD and Update, it says they're both locked. When I exit and go to disk manager, First Aid complete fine when I unmount both of them, but if I leave them unmounted then Install MacOS doesn't see them. What am I doing wrong? How do I unlock the drives to reinstall the OS, and which one do I use?
And while we're on the subject, our Mac is wired to the network with an Ethernet cable. Why is there no provision to use the Ethernet babled network - only a wireless connection comes up, and our Library has a security page you have to approve in a browser, so the connection on the Mac fails. I have to use my phone as a wireless hotspot to get as far as I did! But that's a side issue. I really want to get this Mac going for the public.
I maintain PCs in a library environment, and this is our only Mac. Thanks for your patience.