I'm moving from iMac 12.7 to Mac-mini 15.1 and Thunderbird's old files cannot be imported. So, I deleted the failed Thunderbird app in the new Mac-mini and download a new Thunderbird to the Mac-mini. I made sure it's the desktop version with US English for Mac before hitting the download key. After downloading the Thunderbird 128.4.3esr.dmg and double-clicking the file and moving Thunderbird into the "Applications" directory. This last step seems to go on forever, that is, when I tried to eject the Thunderbird's download, it claim the download is NOT finished. What did I do wrong, and how to fix this problem?

Roger (magian@att.net)