[Maarten55]

Hi, I wanted to connect my Kindle Oasis to Calibre, but got an error message that the device couldn't be found. I'm using Mac Catalina 10.15.5 by the way.
After several tries I booted up again, which didn't help. Then I noticed my Calibre version might be outdated (though I hadn't received any update messages lately). So I uninstalled Calibre and downloaded version 4.20.0.
Then I got this: "the following disk images couldn't be opened" and "resource busy".
So now not only does my Kindle not connect, but I haven't got Calibre at all anymore.
What went wrong?
Any help is much appreciated