Last week I upgraded from macOS Mojave to macOS Catalina - but many of my programs went grey with the question mark. Yesterday, I backed up my computer and downgraded back to macOS Mojave.
After adding my files from my backup, I found there were now 2 HD's on my desktop, Macintosh HD and Macintosh HD Data. I'm not sure what this is about, so if anyone has an info - it would be appreciated.
I went to the Mac App Store to download previously purchased or free apps that I had, like Keynote, Pages, even Solitaire, I get these 2 different messages.
The first is below, the second just says "cancelled".
Any ideas on how to fix this?