Thanks HP for a great, AND FREE, scan App. I went to my computer' scan folder and there each document had been saved to a separate jpeg. Delighted, I stacked several documents on my printers from feed and each document was scanned. The Easy Scan App reappeared and when the scan completed and displayed in the App, I clicked on 'Send' which opened a save window where I selected a Folder for storing all future scans.
Once completed, a document that I had previously placed on my printer started being scanned. I downloaded HP Easy Scan to my new iMac Pro and once the download completed and the App opened, I went to devices on my computer and clicked on my office 'HP OfficeJet Pro 8600' Icon - immediately my computer started downloading a new print driver file.