My Mac Pro was delivered via FedEx Ground. It shipped on a Monday for delivery on Friday. I watched the delivery notifications all week and took the day off on Friday so that I could sign for it. (It said "signature required" on the FedEx shipping page.) Friday came and the shipping status changed to delivery between 4 pm and 7 pm, or some such. I waited anxiously by the door. At 6:30 pm my daughter was out for a run and texted me that the FedEx Ground truck was in our neighborhood.
At 6:45 pm the delivery status suddenly changed to "next business day, no delivery attempt made." I called FedEx and the person explained that FedEx Ground drivers are contract employees and if they suddenly decide that they don't want to deliver any more packages that day then they just stop and there's nothing that can be done. I offered to pick it up from the FedEx Ground depot on Saturday but they informed me that the FedEx Ground facility is closed on the weekend. I complained and explained that I had taken a day off to sign for it and that nobody would be availble on Monday to sign for it and blah blah blah. The person was apologetic but could do nothing. (Have you noticed that customer service people always "understand" and they're always "sorry," but there's nothing they can do?)
I hung up expecting that the Mac wouldn't be delivered until Monday and started pondering how I would have someone around to sign for it. I guess I complained loudly enough, though, because even while the status still said "Monday" delivery when I woke up Saturday morning, they had transferred the package to a "real" FedEx truck and delivered it by noon Saturday.
Glad things worked out for you!
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By way of update, I called Apple this morning after seeing absolutely no movement on the package since Wednesday/Thursday. The representative was much nicer than the guy I spoke with on Friday. I explained to her that it was time to order a replacement and she went ahead and did so. Now, I have to wait for Apple to build another machine and send it out via overnight mail.