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The next Shambles wrote:

I had issues out of the box with migrating from my previous iMac to the new one....hiding my old iMac in the closet so my new one wouldn't keep getting confused as to which one it was!

Indeed. Not many people know the secret. You can "migrate", but you can't be in two places at once. If you migrate your data from one computer to another, you must completely erase and reset the old computer.

The best solution is to keep as much data as possible in iCloud. Then it is very simple to just setup iCloud on a new device and optionally copy over any documents that don't fit.

Thanks for your reply. The migration issue along with several other OS issues was over a year ago so I don't remember all the details and didn't save my case numbers for further reference. We did completely erase  the old computer AND the new one, and reinstalled the entire systems for each to no avail. I had used migration several times in the past with no problem.

My issues were escalated to some senior tech reps who were also baffled at what was going on but worked with me diligently for several weeks. They were knowledgeable, screen shared, and finally helped me transfer the exact files I needed to transfer to the new iMac. That got me up and running but I still had some quirky issues so I just unplugged the old iMac and that solved most of them. I don't need two Macs anymore, but thought it would be convenient for my occasional multi tasking.

Techs said I should be able to run both iMacs, even with different OS versions if the Macs had different names, which they did (Mac 1 and Mac 2). Turned out that iCloud was part of the problem. It may have been resolved by now.

Do you know if there is a way to access my old resolved Apple Care cases if I no longer have the case number? I've been asking all day but, so far, Apple Care hasn't given me a straight "yes or no "answer.

The next Shambles wrote:

Do you know if there is a way to access my old resolved Apple Care cases if I no longer have the case number?

I doubt it. Information management isn't one of Apple's strengths.

Thanks for your input. Yeah, I got that impression too. Yesterday, one chat rep did find some of my case files from that time period, but they were not for the OS problems. I have a feeling all of my case files are in their records but they don't want them to be readily accessible.

Overall, I've been impressed with Apple Care's service. They all speak American English that I can easily understand (after I get them to move their headset mic out from under their chin) and, with the case number system, I don't have to keep telling my story over each time I call.

Missed my chance to edit. Here is a more detailed write up on How to spot fake apps, junk apps, scam ap… - Apple Community

Good to know, thanks.