"macOS Catalin" could not be verified. An error occurred while installing the selected update.
How to resolve this issue?
How to resolve this issue?
Most of the time it requires a better Internet connection, but...
Safe Boot from the HD, (holding Shift key down at bootup), does the problem occur in Safe Mode?
Safe mode attempts to repair Disks & clears lots of caches, so if Safe Mode works try again in regular boot.
Most of the time it requires a better Internet connection, but...
Safe Boot from the HD, (holding Shift key down at bootup), does the problem occur in Safe Mode?
Safe mode attempts to repair Disks & clears lots of caches, so if Safe Mode works try again in regular boot.
Holding down the shift key (for an age) enabled "safe mode" clearly it must give the same effect as chkdsk with Microsoft PCs as afterward I was able to download to install stage macOS Catalina. Much obliged BDAqua, thank you, very much.
Yes, you're correct, great news! :)
Just to finish off this topic: the OS upgrade is now completed to macOS Catalina 10.15; thanks again.
Sweet :D
"macOS Catalin" could not be verified. An error occurred while installing the selected update.