what do i do. the computer is only 24 hours old.
Contact Apple Support. New iMacs come with 30-days premium phone support.
Also maybe try redownloading BigSur from the App Store if the system update link isn't working.
what exactly is the error?
What model/year is the iMac?
Which OS are you running now?
What steps are you doing and what are you trying to migrate from?
"I just bought this imac yesterday brand new from best buy 4-16-2021 it keeps trying to update to big sur but when it gets to the end it keeps giving me a error. it also will not migrate: what do i do. the computer is only 24 hours old."
What the Hassle? If nothing ends up working out, then take it back to Best Buy, return it to them, and get a Mac form Apple, instead.
Better check on Best Buy's return policies; checking their website, they seem to have a lot of "pre-owned" Macs. If you got one of those, that could be the answer to your problem - the previous owner did not prepare it properly to return it. BestBuy also has return exceptions for some products, so do check with them.
catalina 5k 27 inch 2020. 3.3 GHz 6-Core Intel Core i5. 8 GB 2667 MHz DDR4 AMD Radeon Pro 5300 4 GB
this computer is new. never owned by anyone. i am the only owner. its not a open box. its not refurb.
the error says : The Package "%@" is missing or invalid
I would just return it. Why start with a Mac that has issues?
I personally always go to Apple for my Macs, but if you really want Best-buy, then I would have an exchange performed.
Then once you have the new (new) Mac, transfer from the old Mac using your Time Machine backup, or if you don't have one, directly connect the two Macs together for Migration Assistant using an Ethernet cable.
I financed threw BestBuy
If it is new, then I'd absolutely return it. Before you do, do sign out of your iCloud if that was set up. If you migrated data, you do need to make sure to get the disk erased - you don't want a stranger to have access to your stuff. I would not use their support (buying something there is one thing, but fixing it is quite another).
You'll have to check with them re. the financing and how that can be transferred to another device.
While I personally have never had to return an item to Best Buy, a friend of mine did. She did not like a refrigerator that she purchased there. It was financed as well. I was with her when she went back to the store. Frankly, I was expecting a hassle. It was not! No questions asked. They simply credited her account and that was the end of it and they arranged a time to pick up the item. I would think the same would be true with your iMac. I would have the receipt in hand when returning it. Hope you have no hassles. I agree with other posters, I would return the machine.
You can either return it and request they update it to Big Sur or you can call AppleCare for assistant.
By the way, when you post please be specific. Telling us there was an error is worthless as we have no idea what the error was.